... PL2303HX Electronics configuration: USB serial(TTL 3.3v) to 2.5mm gsm data cableUSB gsm upload, backup, upgrade cableCP2102, FT232, PL2303 ... .Sychronise Phone With PC.Change Logos and Graphics. Change Ringtones. Upload Games.Backup Phone Data. Enable Test Mode. Remove Service ... Phone information.View/Reset Security Code.Testing, tuning and other service features. Compatible Phones: T189, T190, T191