Use APKPure App
Get Network Signal Booster 2015 old version APK for Android
If you lose your signal, this app gets it back in one touch!
When this app launches, it quickly refreshes your voice & data/internet signal and then closes itself.
It gives you the best possible signal at your current location!
No need to re-start your phone if you have this app! Just launch it and you're back in business!
Or just refresh bad reception between calls!