It is recommended that you refer to the following methods:
1. View whether the equipment that uses the same operator network around the surrounding operator also has poor signals and determine whether it is the reason for the operator's signal;
2. If metal, magnetic suction cases or brackets are used, such external accessories have a shielding effect on the signal. It is recommended to take it off to try it;
3. In a closed environment, such as: basement elevator, the signal may be blocked, causing the signal to deteriorate, you can go to the outdoor environment;
4. In a remote environment, such as: the top of the mountain, the mountain village, the operator's network coverage may not be comprehensive. You can check whether the comparison of the equipment using the same operator network around is determined whether it is the network coverage: