Smart-Phone-Cards Blog

Mobile phones are a great addition to telecom devices and there have been several changes in the technology used in the mobile phones. In the past, the mobile phones can be operated using the buttons on the mobile. The latest addition to the mobile phones is the touch screen mobile phones. You don’t have to remember which buttons you need to press. Simply, touch the phone screen and go to the menu directly. This saves a lot of time and provides maximum comfort for the mobile users. The display monitor of the touch screen mobile phones has all the functionalities to direct you to the desired menu when you touch the monitor.

Early touch screen devices such as handheld palm series were not essentially touched with the fingers. Human handwriting is difficult to identify and so, these devices required the use of stylus to use the touch sensitive facility. This made the touch screen device, an expensive gadget suitable for use only by the enterprise customers. The latest technology makes it possible to use your fingers to manipulate the mobile phones. You can use the touch screen with your fingers to manipulate the menu and use the stylus to scribble the message if you want to send an SMS. Some touch screen mobile phone models possess a virtual keyboard, which can be used to input text messages.

The touch screen technology utilizes a touch screen sensor glass panel, which has a touch sensitive surface. If you touch the screen of your mobile phone, the sensor sends information to the controller in your mobile device, which in turn responds to your touch. As the technology involves a lot of process, the design of touch screen mobile phones is complicated compared to the normal mobile phones.

Touch screen mobile phones have become the fashion icon for the young teens. If you want to exhibit yourself as the person on the pinnacle of latest technology, you need to have a touch screen mobile phone in your hands. Touch the screen, go to the menu, and forget the clumsiness involved in operating regular mobile phones. People now prefer touch screen mobile phones and they are ready to buy such phones even though these phones are priced high. Apple iPhone has motivated every mobile phone manufacturer to develop touch screen phones.

When you shop for the touch screen mobile phones, you have to check if the phone responds immediately. If you are not comfortable with the models that need the use of a stylus, you can prefer the other models. The major problem with the touch screen mobile phones is the fingerprints on the screen. Sometimes, you will not feel comfortable with the touch screen unless you are used to it. Lack of precision is another problem experienced by the touch screen mobile phone users. Fingers have a broad area and so, sometimes, unwanted functionalities may be invoked because of an imprecise touch. You need to buy special accessories to keep the mobile phones safe in rugged environments.

See also: Online Phone Cards

Code division multiple access, simply called as CDMA is the technology used for radio communication in the present day mobile phones. This multiple access scheme allows sending of voice, data and signals for digital radio. The channels in this technology are defined with the use of PN sequences. The major advantage with this technology is the use of same frequency channel rather than the TDMA used in GSM devices. This facility allows several mobile phones to be controlled by a few cell sites and hence, CDMA is an economical technology for mobile phones.

Numerous standards have been developed for the CDMA technology. The latest standard used in mobile phones is the CDMA2000, which is compatible with the earlier standards. The CDMA standard is a proprietary standard developed by the Qualcomm telecommunication company in the United States in the year 1993. This technology is used in the mobile phones of North America and several parts of Asia. The improvements made to the standard make it possible to use in the latest generation mobile phones, which require higher data transfer rate. Transmission speed is important in the case of modern wireless devices.

The CDMA is superior to GSM in terms of time signals. CDMA devices can send accurate time signals and hence, CDMA is preferred for most of the global positioning system (GPS) which utilizes the accurate time signals. These CDMA signals can be referenced inside the buildings without the need for any antenna outside the building.

The terrains and the number of subscribers determine the coverage offered by CDMA. In cities where the population is dense, high frequencies are used and many small cell sites are installed. In the rural areas, low frequencies are used with limited cell sites for broader coverage. CDMA is also used to provide fixed-line networking, making use of the wireless local loop technology.

When you use your CDMA mobile phone to initiate a call, a communication is initiated between the mobile and the fixed base station. After establishing the communication, the movement of the destination mobile is estimated and the service is handed over the other base station. Only one cell at a time gets access to the mobile device. CDMA solves the increasing capacity problem with other radio standards. In CDMA, each user is allocated a distinct instance of noise carrier. No separate spectrum or time slot is needed for every user with CDMA.

No single technology fits with all the telecommunication devices. CDMA devices provide inter operability and the forward and backward compatibility. The standard has been improved to accommodate the demands of wireless networks. The 3G technology can work efficiently to transmit voice and broadband data using the CDMA technology. The mobile broadband service providers see CDMA as the economical and easy to deploy technology. However, GSM technology is also improved and it has its own huge number of subscribers in other parts of America. The efficient use of limited available spectrum makes CDMA, a leader in the mobile phone technology standards.

In the world that we live in, everyone wants to know what things cost. This is especially true when looking to purchase a phone card. Now bear in mind that there are at least three different types of phone card: local, long distance and cards for a pre paid phone. The first two are usually interchangeable and the third is specific to pay as you go plans for any number of telephone service providers such as Verizon, T-Mobile and TracFone just to name three providers of pay as you go services.

With that being said, how will you know if you are getting your money’s worth with a pay as you use phone card? This is dependent upon your pay as you use provider. Usual card limits are 15 30 45 60 and 120 dollars for a prepaid phone card. What you need to look at is how much time worth phone calls you can make with these monetary limits. You may also have service charges, such as a per day rate to consider. It is up to you how much time you put on a pay as you go phone.

Now when dealing with the local and long distance cards, you will need to do a bit of comparison shopping in order to get the best deal. You will need to compare the rate per minute, connection charge and time limit for the money paid. You will also need to look at the units that will be used if you are choosing to make an international call. This one factor needs to be checked when looking into long distance, especially if you have travel planned for overseas.

Also comparing providers will also get you a good deal. Sometimes going with a less known provider does have its drawbacks, but sometimes they can out do the major companies for cost effectiveness and minutes. All phone cards must have the rates listed on them. Some cards can charge as little as .01 per minute, while others charge up to 5 cents per minute. Again, this varies with the provider. Something else that you need to look for is where you can use the card. This can be a bit of a sticking point, as some cards are only for use with certain countries or to certain countries. Another point to be noted is that few companies give good discounts on calling going to certain destinations and originating from a certain location.

Here is one last thing to remember when choosing a phone card. They have time limits. Even the rechargeable ones have limits, usually two years from date of first purchase. So bear that in mind when looking for a phone card. This also pertains to pay as you go cards. All phone cards have a certain time limit and certain restrictions will apply. Check the fine print before purchase. With this being said, the above tips are valuable when choosing a phone card, no matter what the usage of that phone card will be.

See Also: Prepaid Phone Cards, India Calling Cards

Sometimes, identifying the best calling card distributor takes a little detective work. There are so many all over the world that you have to first decide where you are going to use the calling card and where you would be calling to in order to narrow down the prospects for calling cards. There are many calling card distributors and dependent upon country, a wide variety of cards to choose from. There are really two ways to go about this. The first way is if you are going to plan to get into business selling these calling cards.

If you want to get into a business of selling these cards, then locating a calling card distributor can be easy. An internet search will do nicely. However, with that being said, you also have to look at the rate of return on one of these cards, the area that you are doing business in and the distribution of these cards. When looking into this business opportunity, a few common sense rules apply. Check out the distributor carefully before signing any type of contract. In addition, you need to know how long they have been in business. The third thing is where their range is.

These three things should tell you what you want to know in order to proceed in a business. Now if you are looking for cards to use, that is a different story. There are many card distributors all around the world. These cards have different ranges and different prices as well as different time limits for these cards. What you will need to look at is

1. What is the price per minute – how much you will be charged on the card for making the calls?

2. What countries that you can call with the card. This can sometimes be a deal breaker.

3. What time limits the card has – This means how many minutes you are purchasing and

4. Is this card rechargeable? These four questions have different answers.

Many cards are country specific and some do not allow for international calling or else charge you a ridiculous amount of time to make the particular call. You need to look into these before, so that you may make the correct choice. Some popular companies such as AT&T, BellSouth, Verizon create calling cards that can be used for calls overseas.

Those are just some of the local major companies that create the calling cards. There are other types of phone cards from smaller players, such as Homies, which bring an entertainment factor to the phone cards. There are different types of websites that promote calling cards that are good for wholesale as well as those that sell to the customer directly. You have your choice of times, costs and a rechargeable card as well. These can be found by searching on Google by simply typing in “Calling card providers”. This has given a short overview of finding a calling card provider or distributor.

So conduct some good research before you go in for a calling card!

When dealing with phone cards, there are many different options available for use of these phone cards. Now you would think that rechargeable cards would be on the top of the list, but sometimes they are not. Now there are many different reasons that you would want to go for a rechargeable phone card. These would not be limited to repeated use of the same card, if you are going to be calling a lot and if you want a cost effective way to manage your long distance calling costs for either domestic or international calling.

Rechargeable phone cards are a good way to use the same card multiple times without having to buy a new card each and every time. The only thing that you really will have to watch out for is the time limit. Some rechargeable cards expire after two years, so you would need to keep an eagle eye on the expiration date. At the end of the two years, you would need to buy another card, but you can recharge the new card for up to two years also. Therefore, this is a good way to keep your costs down.

These rechargeable cards are good for those who travel either domestically or internationally. This is another reason to get a rechargeable card. You pay the same price without having to get a new card. Most rechargeable cards have a time limit, such as 1000 to 2000 minutes. They can then be recharged when the time runs out. Most can also be used for overseas calls to most any country. These are a cost effective way to keep phone call costs down. They can also be used in a variety of countries or even specific countries from the United States or Europe.

Therefore, you can see why going for one of these rechargeable cards is a good idea. Most can be recharged at retail outlets that sell these types of cards to the public. Many different cards charge a different rate for connection and cost per minute. However, overall, a rechargeable phone card is usually your best bet when dealing with calling cards. It can be expensive, time consuming and frustrating to have a one-use card. If you are traveling and your card runs out, then you know the aggravation that brings to mind when dealing with a non-rechargeable card.

So if you are traveling constantly, have friends overseas, or just want to keep your costs down, then a rechargeable card may be the best bet for you. The costs are usually low sometimes 25.00 for a 2000 minute card and the fact that they can be recharged is a boost, especially when you are traveling and cannot afford to be out of phone communications. This is also a cost effective way to keep your long distance telephone bills down to a reasonable amount. So now, you know when to spring for a rechargeable phone card for yourself or someone you love.

Video conferencing uses telecommunication technologies of audio-visual means to bring people of different places and locations together for a meeting group discussion. It has also been called “visual collaboration” because although you are physically distant from each other, you can actually see each other in the screens of your television or other technological devices such as your computer or even your mobile phone. Video conference is totally different from videophone because videophone is designed for a one-on-one conversation between two individuals while videoconferencing tends to bring together a group for a meeting. Videoconferencing adds another possible alternative, and can be considered when a live conversation is needed, visual information is an important component of the conversation, the parties of the conversation can’t physically come to the same location or the expense or time of travel is a consideration to the attending individual or group.

We have several significance regarding the use of Video Conferencing, this includes:

First is that it is time-saving since instead of traveling for a couple of hours or several days just to attend a meeting, you can just have it in an instant anytime and anywhere. It will also save you time to relax or have some quality time together with your friends or family.

Secondly, it saves effort and because with videoconferencing you get to skip long trips, you then will not be straining yourself further thus avoiding stress and exhaustion. Now, you have more energy to concentrate on work better and the relaxing and worry-free meeting process.

Third, it provides privacy if you want your discussions and other important matters and files to be top secret and to be exclusive for authorized people only. It also provides confidentiality only within the people involved having the general meeting or assembly so as for the people not to be exposed and revealed.

Fourth, it became useful to the general public. Video conference system-based technological equipments such as the webcam, personal computer system; software compression and broadband Internet connectivity have become affordable and very reasonable at cost for the general public. Also, the hardware used for this technology has continued to improve in quality, and prices have lowered significantly. Videoconferencing became accessible to many because of the availability of freeware such as chat programs.

Lastly, it became useful also in the educational arena wherein videoconferencing has also become a hit. It gives the students the chance to learn by involving themselves in a 2-way communication platform. Also, the teachers, instructors, professors and lecturers from around the globe can teach students from different places also without physical contact through general telecom in the form of video conference. Through video conferencing, the students now can learn more, explore, communicate, analyze and impart knowledge with each another. Virtual field trips are also provided to children especially those who live in the far flung areas or those who belong to the lower class who cannot afford to go to educational trips that require a certain amount of money.

There are more vital uses of video conference in our telecommunications today and it continues to improve itself as technology advances and as time goes on.

For little more than fifty years, cellular phones have been existent as a technology. People recently started using cellular phones as a part of their daily life. Today in the United States and everywhere in the world, a member or even more than one member of each home owns cellular phones. It becomes part of our daily lives by constantly connecting people with one another. Cellular phones perfects a unique role during urgent and in times of emergency by providing an easy communication tool.

To help us understand better, further notes establish a definition of cellular phones; discusses how cellular phones work and conversion of speech into electrical impulses.

What is a Cellular Phone?

Cellular phones are described as sophisticated radios. It consists of a cellular phone base station and a tower at the center of every cell for wireless communication gadget which uses small cells. These have extensive frequencies allowing people to use this communication device at the same time. By this, calls are transferred from one base station to another as the person who uses it travels from every cell. For instance, if you were to go at one place to another, your calls would be transmitted from base stations on your way. Cellular phones make use of a short-wave analog also known as digital telecommunication; it is where the user has wireless connectivity from a mobile phone to a comparatively close transmitter and receiver in the base station.

How do Cell Phones Work?

Cellular phones transmit to towers where handoff happens when you go from one cell to other cell. Mobile telephone switching office (MTSO) is the central office that runs hundreds of towers in a large city. You don’t realize that handoffs are occurring to you because it is not visible, this is what happens when someone contacts you.

Initially, when you turn on your cellular phone, it uses particular frequencies (control channel), which the tower and cellular phone use to communicate with each other. Second, the cellular phone transmits a registration request to MTSO to keep track of your cellular phone spot in the database. Third, the MTSO finds your location in the database. Fourth, a frequency pair is chosen by the MTSO for your communication device in that cell to reply to a call. Fifth, through your cellular phone, you will be informed by the MTSO on what frequencies to use. Finally, a diminishing sign will be interpreted by the tower as you head toward the border of the cell.

The Technology of Turning Speech Into Digital?

A coder inside the telephone converts sound to digital impulses; it converts these impulses to analog sounds. Vocoder analyzes speech and it is a synthesizer all in one, vocoder is also a coder. A vocoder is located on every large chip in a digital wireless telephone called a digital signal processor.

Ears are responding to tiny, swift changes in the weight of the air as you hear sound, these changes are known as sound waves. Pure sine waves to compound combinations of waves are what sound waves ranges.

Telecommunications has come a long way, although today’s technology makes it easier than ever to communicate with someone across the world or across the hall, many people still have a tough time understanding it. Nowadays, telecommunications is improving and still is as each second ticks. The telecom industry includes new technological gadgets such as mobile phones, service providers, telecommunication products, the GSM, CDMA, WILL market, and 3G Spectrum. One of these gadgets is the iPod which is popularly known for playing music and because of scientific ingenuity it can also function as a note pad, remote control, storage device, a TV, Ouija board, a boom box and a lot more. Today, with the help of modern technology, the iPod is also used in general telecommunications. For instance the iPod is also designed for telecommunications purpose like phone calls, text messaging, videophones and video conferencing. With this new gadget, telecommunications is made easy making urgent or regular calls or messages faster to reach the person it is intended for. Furthermore, it improves verbal or non-verbal communication as well as written or spoken, and even in the use of symbols and signs.

The iPod can be used for communications in several ways around the globe:

First, by Phreaking Out your iPod, you can now make free phone calls. This is good news for people especially for those who are financially constrained and cannot afford to pay regular bills for a telephone line. This way, it eases communications with your loved ones as well as important transactions.

Secondly, you can create a pirate radio station with your very own iPod since it now possible to broadcast a radio station through the iPod. Similarly, this will make broadcasting messages, information, knowledge and songs easily with your very own pirate radio station. To do this however, one would need an iPod mini, an iTrip mini and as an option, iPods, iTalks and iTrips wherein its availability makes better quality. These devices are necessary to be combined to enable broadcasting from the iPod.

Third, you can also use speed dials with your iPod. With speed dials, you can have an easier access into making phone calls, which will make the caller’s life easier. This can be possible by the power of your iPod, portable speakers and the mp3 recordings of phone numbers to make your speed dials.

Fourth, the iPod is very useful in transferring and sharing of ideas, general knowledge and information. It is a must have for every student in their pursuit of knowledge, to enable generation of new ideas and to learn. The iPod will help them communicate these matters to their teachers, family, and friends and to their fellow students.

These are just few of the many uses of iPod in general telecommunications. Not only does it perform in this category but also in many aspects like the Music industry, Educational and Informational Aspect and of course in Multimedia. Moreover, the iPod is useful for every individual in performing daily tasks and acquiring new ideas.

Long Range Cordless Telephones earlier than the development of the cellular technology. The system includes the VHF and UHF cordless phone system that can be used until 100 km range from the base. This cost effective device can be used at an easy handle and simple mechanics. This telephone system is ideal for areas where residents and homes are considerably distant in proximity. To monitor your farmland or cottage (with the use of appropriate amplifier) from a distance, the long-range cordless telephones are accessible for your convenience.

The long-range cordless telephone systems however are not sold in North America since they exceed the maximum power required as dictated by the FCC or DOC. This is the main reason why people in North America never hear or see them in the region. It provides an excellent alternate system to cellular phones with its excellent digital clear transmission to people in the region when necessary.

This system’s base station can be set up with ease in seconds not necessarily requiring any technical knowledge. As compared to cellular phones, no user fees are collected and you can talk to your satisfaction without worrying about your airtime charges.

What are some of the main features of this device? The system is endowed with a high grade military scrambler that can stop eavesdropping for a secure line, it has very superior details that it can service 99 hand sets that can access up to 100 km with optional booster, it is ISO 9001 certified and is rugged enough to match its durability and practical use. Some models follow the modern environment with additional features to respond to the modern fashion. Others come in small pocket size, easy to carry which is compact and light; the screens can display 6 colors to color code different groups; multi-language screen display for easier operation; vibration or silent call vibrating mode during meetings and easy access by direct talk between handsets as walkie-talkies.

The system surely brings about significant benefits. The long-range cordless telephone is able to reach to a 100 km distance but does not require any payment before being able to connect to the other end of the line. As compared to office cordless phones that normally have 50-300 meter range, the long-range cordless telephones can go beyond normal city diameter when used with suitable amplifier or GP Booster.

Equally where there are no lines are available, it can extend the range of normal telephone systems and avail of regular telephone line service. It also reduces the necessity of cellular phones thus, saving charges for airtime use. The system can as well be used to send data to remote areas as include the modern features of communication such as faxing, retrieving emails and Internet access.

In addition, other brands can be maximized by small to medium business or companies by providing enough handsets to cover the different branches or departments respectively. Often it can provide competitive prices for the same services needed.

The General Packet Radio Service or GPRS is a telecommunications technology that is presently transforming the present shape of mobile communications. GPRS is a packet oriented Mobile Data Service providing data rates from 56 up to 114 kbit/s. Users of IS-36 mobile phones and Global System for Mobile Communications (GSM) can readily avail of this service.

How does a GPRS work? A GPRS connection is linked by orientation to its Access Point Name (APN). The APN then identifies the appropriate services like Wireless Application Protocol (WAP) access, Multimedia Messaging Service (MMS), Short Message Service (SMS), and for Internet communication services such as World Wide Web access and email. The charge for GPRS data transfer is per megabyte of traffic transferred as compared to data communication via traditional circuit switching that is charged per minute of connection time, whether or not the capacity is used or is in an idle state. Thus, as compared to circuit switching, GPRS is a best-effort packet switched service providing a certain Quality of Service (QoS) that is guaranteed in the link for non-mobile clients.

What are the basic features of GPRS? Frequency division duplex of FDD and TDMA provide multiple access methods used in GSM and GPRS. When a session is ongoing, a user is assigned to a pair of down-link and up-link frequency channels that is combined with time domain statistical multiplexing. This is done through packet mode communication making it feasible for more users to use the same frequency channel. To correspond to the GSM time slot, the packets have constant length. The down-link follows a first-come-first served packet scheduling and on the other hand, the up-link uses a mechanism close to reservation ALOHA. Meaning, the slotted Aloha (S-ALOHA) during a contention phase is used for reservation inquiries while a dynamic TDMA is used to transfer the actual data with first-come first-served scheduling.

What are the different types of connections to GPRS? Today there are various types with distinct features that exist in the market:

Class A can be linked to GPRS and GSM services (voice, SMS), where both can be used at the same time. Class B can also be linked to GPRS and GSM service (voice, SMS), however only one can be used at a given time thus, suspending the GPRS service during GSM service (voice call or SMS), and only then will it automatically resume after the GSM service has concluded. This class covers most GPRS mobile devices. Class C must be switched manually between GPRS service or GSM service since it is connected to either.

How does GPRS upgrade GSM data services? The GPRS supports GSM data with Multimedia Messaging Service (MMS), push to talk over Cellular PoC/PTT, in the wireless village an instant messaging and presence feature, access of Wireless Application Protocol (WAP) in Internet Applications for Smart devices, Short Message Services or SMS, and further enhances new functions such as higher capacity, new protocols, new accesses and new radio networks.

The channel encoding used will dictate the GPRS speed transfer. The fastest however least robust coding scheme (CS-4) is accessible when in proximity to a base transceiver station (BTS). Going further away from the BTS though gives the most robust coding scheme (CS-1).