Connect the phone to the computer. Open 3uTools and view device details. 3uTools is unable to read data of the baseband version and Wi-Fi module.

Because the phone had no service after being dropped. It can be preliminarily judged that the pseudo-soldering of the middle layer may cause the trouble. Next, we need to separate the motherboard. Put the motherboard on the Heating Platform and peel off the foam.

To make it easier to remove the logic board after separation, drive a screw on the logic board. Cut through the tape with a sculpture knife.