There are some places or areas where the signal for cell-phones is very weak. The weakness of cell signals can be caused by many things. It can be because of the structure of the building that contains so many thick walls of concrete, or another material like aluminum. The location of transmission towers and electrical interference also can cause the signal weakness or even loss.

Fortunately there is a solution for this problem. You can try wilson electronics cell booster to boost the signal for your cell phone.