Information About GSM Vs CDMA Technology

Card Subscriber Identity Module (SIM) phones in the United States and other countries is exclusive use of GSM SIM cards. The removable SIM card allows mobile are activated instantly, allowing mobile data exchange, change and improve, all without the intervention of the owner of the phone. The SIM itself is tied to the network, instead of a regular phone. The phones that are enabled for the card can be used with any GSM carrier.

The CDMA equivalent, a R-UIM card: available only in parts of Asia but remains on the horizon for the U.S. market. CDMA in the U.S. require proprietary devices are attached to some airlines that require it. To upgrade a CDMA phone, the owner must disable the old mobile and then turn on again. The old cell phone will become unusable.

Signal Quality: For the most part, the two networks have a fairly wide coverage in big cities and along major highways. GSM companies, however, have roaming agreements with GSM operators, allowing greater coverage of rural areas in general. CDMA networks can not cover remote rural areas, as well as GSM carriers, but you can make calls using GSM phones with a specific signal for these rural areas, but the charge to the owner will be significantly higher.

International Signal: If you need to make calls to other countries, a GSM operator can offer an international signal, such as GSM networks dominate the global market. If you travel to other countries can use the GSM mobile phone abroad, provided they possess a quad-band phone (850/900/1800/1900 MHz). By purchasing a SIM card with minutes and a local number in the country you are visiting, you can make calls from the SIM card to store international signal rates and pay your phone company back home. CDMA phones and their cards do not have these advantages, however, there are several countries that use CDMA networks. Check with your CDMA provider to find specific requirements.

According CDG.org, CDMA networks support has more than 270 million subscribers worldwide, while GSM.org according to their results have more than 1 billion subscribers. CDMA phones have R-UIM enabled, roaming agreements for this technology from telephony networks tend to improve in the future, the integration of standards over time can make all the differences are clear and convenient for consumers.

The head of the GSM technology in the United States, Cingular Wireless, recently merged with AT & T Wireless and T-Mobile USA. Major CDMA operators are Sprint PCS, Verizon and Virgin Mobile. There are also several smaller cellular companies on both networks.