2.5mm gsm data cable usb serial cable gsm T189, T190, T191 data upgrade,upload,backup FT232RL/CP2102/PL2303HX Electronics configuration:        USB serial(TTL 3.3v) to 2.5mm gsm data cableUSB gsm upload, backup, upgrade cableCP2102, FT232, PL2303 optionalPinout: VCC, GND, TXD, RXDTypical function:Send/Manage Text Messages. Edit/Manage Phonebook/Calendar/Profiles/WAP.Sychronise Phone With PC.Change Logos and Graphics. Change Ringtones. Upload Games.Backup Phone Data. Enable Test Mode. Remove Service Provider/Network Locks (Unlock).Upgrade Phone Software.Repair IMEI Number data.Repair EEPROM faults/Flash EEPROM.Test/Configure Phone Hardware.View Phone information.View/Reset Security Code.Testing, tuning and other service features.

Compatible Phones:

T189, T190, T191