GSM vs. 3G CDMA
Phones that use the 3G connection constantly will have a shorter battery. The parts used to allow the 3G connection just use much more juice. It is a faster connection for web browsing, sending MMS, e-mail, etc.
As far as for actually making calls, it all depends on the signal strength of where you are.
As far as for actually making calls, it all depends on the signal strength of where you are.




