What should I do if the signal of Xiaomi MIX3 mobile phone is poor?

The mobile phone can recognize the SIM card, but the signal is poor (weak), so it is impossible to make or receive calls; There are many reasons for poor (weak) cell phone signal, such as surrounding environment, weather, location, operators themselves, common usage habits (such as using metal protective covers), system failure, mobile phone hardware, etc. Suggest the following troubleshooting methods:

1, unable to make or receive calls, but the cell phone signal bar shows normal. First, check whether the SIM card is in arrears;

2. According to the operator of the SIM card used, choose a reasonable network type setting, and it is recommended to give priority to 4G;

3. If you try to make a phone call in other places, for example, outdoors and in an undisturbed environment, will this happen? , and eliminate the weak mobile phone signal caused by poor operator signal in the use environment (such as basement, tunnel, relatively closed building, etc.). );

4. Determine whether it is the operator's own network problem. For example, check whether the network of the same operator used by colleagues or friends is normal. In addition, we can't rule out the cause of SIM card aging. Try to replace the SIM card of the same network.

5. In order to pursue beauty, some protective shells on the market are treated by electroplating technology in a large area, and the metal inside will shield the mobile phone signal, thus affecting the reception and emission of the mobile phone signal. If such a protective shell is used, it is recommended to take it off temporarily and check the signal situation;

6. It is recommended to check whether the MIUI version is the latest version (the MIUI version page has relevant prompts). It is recommended to check the cell phone signal bar or make a phone call after updating to the latest version of MIUI.

7. After excluding external reasons such as local network operators' problems, environmental interference and system problems. , settings-my device >; & gt all parameters >> status information -SIM card status, or enter * # * # 4636 # * # *>& gt in the mobile phone information to check the signal strength of the mobile phone. Generally, -50dbm_-90dbm is a relatively normal range. If it is above-100dbm and occasionally jumps to the normal range, there may be a signal problem. You need to take your mobile phone to Xiaomi authorized maintenance service center for testing and processing.