Question: is wcdma 2g or 3g?
Answer: In a nutshell: GSM = 2G, WCDMA = 3G. For auto-switching between 2G/3G modes, use the "GSM/WCDMA auto" mode (system balances speed vs battery use based on current signal strength). For 2G-only battery saving mode, use "GSM only". For higher data speeds (regardless of battery use), choose "CDMA only".