
SCH-W139 is dual on phone, which has 2 slot of simcard CDMA on slot 1 and GSM on slot 2. This type of mobile phone is suitable for those who need to have both simcard CDMA and GSM to be simple in just one device.
If we want to make a call or sms from CDMA number and then want to change to use GSM number there's no need to be worried because this phone...