What should I do if the Xiaomi 12S Ultra has a poor signal?

As Xiaomi's mobile phone, the Xiaomi 12S Ultra will inevitably encounter signal disconnection and other situations, resulting in the phone not being able to connect to the network. In addition to daily phone calls, Internet surfing depends on signal and traffic, how to solve this problem if this mobile phone has this kind of problem?

What should I do if the Xiaomi 12S Ultra has a bad signal? Xiaomi 12S Ultra Signal Difference Solution

The phone can recognize the SIM card, but the signal is not good (weak signal), and it is impossible to make outgoing calls or receive calls; There are many reasons for poor mobile phone signal (weak signal), such as the surrounding environment, weather, location, the operator itself, usual usage habits (such as using a metal protective case), system failure, mobile phone hardware, etc.; We recommend that you use the following methods to troubleshoot:

1. If you can't make an outgoing call or can't receive a call, but the mobile phone signal bar is displayed normally, you need to 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 choose 4G priority;

3. Whether this will also happen if you try to make a call from another location, such as an outdoor, non-interference environment, etc., and exclude the weak mobile phone signal caused by the operator's poor signal in the use environment (such as basements, tunnels, closed buildings, etc.);

4. Determine whether it is the operator's own network problem, such as checking whether the network of the same operator used by colleagues or friends is normal, in addition, the reason for the aging of the SIM card is not ruled out, you can try to replace a SIM card with the same network as the operation;

5. In order to pursue beauty, some protective shells on the market are treated with a large area of electroplating process, in which the metal will play a shielding role in the mobile phone signal, thereby affecting the reception and transmission of the mobile phone signal.

6. It is recommended to check whether the MIUI version is the latest version (there are relevant prompts on the MIUI version page), it is recommended to update to the latest version of MIUI, and then check the mobile phone signal bar or make a phone call.

7. After ruling out external reasons such as local network operator problems, interference in the used environment, system problems, etc., in Settings - My Device >> All Parameters >> Status Information - SIM Card Status, or enter *#*#4636#*#*>> mobile phone information in the dialing interface, check the signal strength of the mobile phone, generally normal conditions in -50dbm_-90dbm is a relatively normal range, if it is -100dbm or more occasionally jump to the normal range, There may be some problems with the signal, so you need to take your phone to Xiaomi's authorized repair service center for testing and processing.