Difference between CDMA & GSM carriers
by Pepe7 - 2/16/09 8:35 AM
In Reply to: switching my phones by goldengirl53
The main difference is, CDMA carriers like Sprint, Alltel & Verizon use the ESN (electronic serial number) on the actual phone to gain access to their networks/services. GSM carriers are slightly different in that they require an active SIM card along with any compatible device (handset). In this regard, you can move the SIM card to another (unlocked, or locked to the carrier in question) phone and still get service. Switching phones among the various CDMA carriers isn't as easy since they would have to be made aware of the new ESN and also have the phone's firmware/software be compatible with a new carrier's services. You will have to call customer service to see if they will (yet) allow this switch. They might very well tell you to go with a GSM carrier for this model of service.
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