Difference Between WCDMA and GSM | Difference Between | WCDMA vs GSM
Here in Australia the cell phone providers are slowly phasing out 2g gsm 1.8 ghz is starting band for lte and 900 mhz for 3g umts with the 2.1 ghz 900 is still used for 2g gsm and it would look like it will get harder to make a phone call on 2g gsm 900 mh...