How to find RX TX pins at chinesse phones with Infinity

[ka2]

How to find Rx Tx pins with Infinity box.

1. Locating GND pins at Chinesse miracle and connect with Infinity box
2. with multimetter finding all pins who have ~ 2,7-2,8 volts at connector
3. With cable and needle that conected at Tx at infinitybox (pin 2 RJ45) make operation "Read detailed information"
4. When box say "Press Power button" we find that pin who cause no power phone when pressing power.
That is pin Tx (pin2 rj45 at infinitybox) and solder wire at phone connector
5. After that with soldered wire (Tx) and connected wire with needle at Rx signal at Infinitybox (pin3 RJ45)
we try to find pin at phone connector (when phone start to communicate with box at same mode "Read detailed information")

Sorry for my bad English .