Pantech GB300 pinouts
The connector/pinout information may be applied to the Pantech model GB300

 Pantech 24 pin cable connector pinout Full pinout for Pantech C300, G300, G600, G700, G800, G900, GB100, GB200, GB300, GF200, GF500, PG1200, PG1400, PG1500, PG3000, PG3200, PG3500, PG3600, PG6100, PG8000. Used in almost all Pantech phones?
Pantech 24 pin cable connector pinout Full pinout for Pantech C300, G300, G600, G700, G800, G900, GB100, GB200, GB300, GF200, GF500, PG1200, PG1400, PG1500, PG3000, PG3200, PG3500, PG3600, PG6100, PG8000. Used in almost all Pantech phones? Pantech GPRS, data cable schematic pinout i.e. for Pantech C300
Pantech GPRS, data cable schematic pinout i.e. for Pantech C300