Here Is Guide Line Just Remove The Back Sticker Of LG KG195 You Will See Some Points And Find Pinout By This Way
attach battery, power On phone.
sometimes i use scotch tape to hold battery in needed position.
put one multmeter probe to some grounded phone part.
with another probe touch one by one each available test point
and look for their voltages.
pins with voltage between 2,7 and 2,9 volts will be Tx&rx
Regards,
UMER