use rj45 cable
if phone not connects then use this code
47*869#123580
go to pot map
in hkf select uhart
then do it will be done sucessfully
or try this
If phone can not be connected after several tries make this:
1. Insert original sim card in phone
2. Power-On phone
3. go to Menu, press 6 then * and type password 123456
4. go to "Port Map", HKF
5. select "UART1"