In recent years, the ownership and use of mobile phones has grown tremendously. Today, almost 90% of the world's population has GSM reception . But that doesn't mean that GSM reception is improving too.

We have all had to display on our phone "mobile network not available" because of our phone network which is not powerful enough and thus not being able to make or not receiving calls. Why don't you have a telephone network? It can be due to several causes. The three main reasons are the distance from the cell tower, obstacles between you and the cell tower, and the isolation of the building you are in.