Why is the signal strength of China Unicom's mobile telecommunication network different in different regions?

The main reason is the difference of signal strength caused by the different positions and numbers of base stations. At present, the three major operators are narrowing this gap by * * * building * *. Moreover, China Unicom has solved the problem of deep coverage through various types of microcellular coverage and cell coverage. Please believe in Unicom, and our signal quality will get better and better.