Assuming you would like instructions on how to restart your cell phone towers:
If you live in an area with limited or no cell phone service, there are a few things you can do to try and refresh your signal. First, make sure that your phone is set to automatically select the strongest signal. To do this on an iPhone, go to Settings > Cellular > Cell Search Priority. On Android, go to Settings > More > Wireless Networks > Network Operators. If this doesn't help, try resetting your network settings. This will erase all saved Wi-Fi passwords and cellular settings on your phone, so make sure you have everything backed up before proceeding. To reset your network settings on an iPhone, go to Settings > General > Reset > Reset Network Settings. On Android, go to Settings > Backup & Reset > Factory Data Reset. Finally, if all else fails, you can try driving around until you find a spot with better reception.