| hello!
please take a look how easy is examinate your phone for correct pinout.
as you can see- battery is attached (phone powered On or not- does not metter). One multimeter probe is on GND (metall shield)
with another you touch one by one all points.
when you see 2,7-2,9 volts- this is Tx/Rx
On my example i am touching correct data pin (voltage 2,7 volts) |