CDMA(experienced on a reliance ZTE cdma phone)
pro-
-good network at all places
-high speed data transfer is good
-call/sms/net packs are cheaper than other mobile network providers
The phone however, is a difference story. Like al cheap android phones, it was laggy, short on memory and had a horrendous screen!
GSM
Network signal fluctuates more
Net is faster
call/sms/net packs are more expensive.
Phone can be an unlocked phone
Both
Very bad customer care over calls, stores are slightly better, but understaffed.