Mobile phone signal booster

I noticed in the Philippines,most of the people have cellphones even the less fortunate ones.Cellphones are very accessible.There are many choices from cheap to expensive ones.Of course they use it as means of communication especially to those places that have no telephone lines.

Some of our relatives live in the province.They are quite far from the city proper.As you know,rural areas have many dead zones.It's difficult for them to call my family or to our other relatives using their cellphones and vice versa.Until now they still don't have telephone lines so they don't have a choice but to use only cellphones.But the problem is that their signal is very weak.They always have to go to a place where the signal is stonger to have a clear phone reception.If only they have a signal booster,I am sure it will be easy for them to receive calls and vice versa.