Redmi k505g signal is not good.

1. Cannot make or receive calls, but the cell phone signal bar is displayed normally. 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 another place, for example, outdoors and in an undisturbed environment, will this happen? , and eliminate the weak mobile phone signal caused by poor operator signal due to environmental factors.

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.

6. It is recommended to check whether the MIUI version is the latest version. It is recommended to update to the latest version of MIUI, and then check the cell phone signal bar or make a phone call.

7. After excluding external reasons such as local network operators' problems, environmental interference and system problems. , check the cell phone signal strength. 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.