In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). Understanding the difference between GSM and CDMA will allow you to choose a carrier that uses the preferable network technology for your needs. Upon viewing competitors' coverage maps you may discover that only GSM or CDMA carriers offer cellular service in your area. So for the non-invested consumer who simply wants bottom line information to make a choice, the following considerations may be helpful.
Outstanding features of CDMA:
1. EVDO, also known as CDMA2000, is giving speed with a downstream rate of about 2 megabits per second. High traffic can degrade speed and performance.
2. CDMA handsets are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activate the new one. The old phone becomes useless.
3. CDMA networks may not cover rural areas as well as GSM carriers, and though they may contract with GSM cells for roaming in more rural areas but it’s expensive.
4. CDMA phones that are not card-enabled do not have capability of international roaming.
Outstanding features of GSM:
1. GSM's with data rates of up to 384 kbps with real world speeds reported closer to 70-140 kbps.
2. GSM phones use SIM cards.
3. GSM have wider coverage of more rural areas, often without roaming charges to the customer.
4. If you travel to other countries you can even use your GSM cell phone abroad.
CDMA(Code Division Multiple Access) is a digital cellular technology that uses spread-spectrum techniques.CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built.It doesn't have sim card.
ReplyDeleteThe reason for more GSM usage is that the international Roaming of GSM is Very good and it has sim card,So you can easily swap your sim card when you need.If we got a locked phone means we can unlock it by getting the unlocking service from any one of the online service provider like MobileUnlockSolutions.com