Is that the charging port that's fixed to the phone? If it falls, that depends.
1, if it is only off welding, it can be re-welded. Heat gun to heat up the upper flux, and then blow with the heat gun until blown off, in the new tail insert welding, and then use a constant temperature electric soldering iron to repair welding.
2, if the welding point of the mobile phone motherboard falls off, the charging interface can not be welded up, can only change the motherboard, or remove the battery and charge the seat.
The USB interface is broken, there are two cases, can not charge and can not connect to the computer, I will explain it below.
1. Disassemble the broken USB interface, use a tin welding gun to heat the pin of the interface, and after the solder melts, use tweezers to remove the interface.
2. Choose the USB interface to replace according to the model of our mobile phone.
3, put the new USB interface to the position of the original USB interface.
4. Solder the new USB interface to the original pin using a tin welding gun.
5, after the mobile phone is installed, open our mobile phone to check the effect of the USB interface, if normal, it proves that our USB interface is installed.