Why do mobile phones often have no signal in the mountains? I hope to talk from a more professional point of view, thank you!

First, there is no signal or the signal is poor, mainly because the signal will be affected by various factors such as topography, landforms and tall buildings. In case the current position is in a relatively closed place, the signal may be affected.

Two, such as other Unicom users mobile phone signal is normal, can be eliminated by the following methods:

Method 1: Turn on the airplane mode, then turn off or restart the phone and try again.

Method 2: Change the mobile phone to change the card test, that is, change the mobile phone card to the mobile phone of family or friends and try again.

Tips:

If there is a general problem with other users' cell phone signals, it may be that there is a problem with the base station nearby. You can click /qAHfS for feedback, and we will check and handle it as soon as possible.