When I plug in my phone, it says that it isn't charging. I'm not sure if this is a problem with my phone battery or with...

Brendan, 1. Check to make sure there is a sim card in the device. If there isn't, visit a retail location for your service provider and purchase a new sim card. Have this card activated by your provider. 2. If there is a valid sim card in the sim card slot, sometimes it needs to be removed and reinserted. The sim may not have been properly positioned in the sim card slot and just needed some adjustment. 3. It is possible that you may have a deactivated sim card. Visit a retail location for your service provider and purchase a new Sim card. Have this card activated by your provider. Good luck!