Experiencing network failure in the middle of a very important call can be very infuriating. You may overlook this if it happens for the first time. However, if the poor reception and dropped calls continues, then your phone signal may probably be the problem. Below are they steps you can take to improve or boost a weak phone signal.

Avoid Obstructions
[/b]If you want to get a very excellent phone signal, you have to avoid obstructions like skyscrapers, Hills, mountains and trees. They actually contribute to poor signal reception.
If you are located in a mountainous area, you can climb the
top of the mountain. You can also trim trees. Just look for a way to avoid these barriers.

[b]Switching Network
If you keep experiencing poor signal and you have called your customer service provider to complain about their
signal, you can simply switch to another network provided while still retaining
your number. For example, your signal is poor in Osun State you can move to another more effective network provider in the state.

Signal Boosters
Signal boosters as the name implies helps boost weak phone signals. When a signal is weak the booster’s job is to boost the signal then rebroadcast it to your phone and other
devices.

Keeping your phone away from devices that Affect the signal
Having gadgets around you can actually jam your signal thereby affecting your phone signal. Just step away from your laptop, and iPhone as well as switch-off Wi-Fi, Bluetooth and hot spot among others. You will definitely notice an appreciable improvement in the signal.

source: http://www.olasblog.com/2015/07/4-steps-to-improve-phone-signals.html