Cell phone signal Why is there no signal when I make a phone call?

If the network mode selected by the mobile phone is not covered locally, it is recommended to enter Settings-Dual Card and Mobile Network to change the network mode.

Replace the use position

Weak signal coverage, alternating signal areas, or strong magnetic field interference in the surrounding environment will all affect the mobile phone signal, so the location comparison can be changed.

Check SIM card

Weak signal coverage, alternating signal areas, or strong magnetic field interference in the surrounding environment will all affect the mobile phone signal, so the location comparison can be changed.

If the above methods are checked and there is still no signal on the mobile phone, please take your mobile phone to the OPPO service center for processing, and we will provide you with nationwide warranty service.