How to detect pinout on spd phone with no rx and tx or dm and dp


I have a phone movitel MH2103 i need to format it so as to reset user code.

When i connect usb to find boot key pc shows device is not recognised.

I tried to open and find pinout on the board i found nothing. No rx or tx also no dm or dp.

Please support me to detect pinouts on this kind of a phone.