Does my phone need coverage/reception, or does my battery need to be charged to use Google Pay?
The phone battery needs to be charged to used Google Pay. You will need an internet connection to register and see notifications of most recent transactions. Your battery will need to be charged to allow you to have the phone switched on when using Google Pay.
The NFC (Near Field Communication) functionality is found in the ‘settings’ section in majority of phones, and needs to be switched on to ensure the app works correctly. Using NFC on your mobile can use the battery a little faster than normal, so you may want to turn it off when you are not using Google Pay.