How to Reset All Settings on iPhone
By Brian Peters
When you're having trouble with iPhone bugs or strange behavior, one thing that might be suggested to you is to restore your iPhone to default settings or reset all settings. What does "Reset All Settings" do? It restores your iPhone settings to the factory default, the same as a new iPhone, without deleting anything else on your phone. You can even choose to only reset certain settings instead of all of them. So, don't worry! You won't lose any of your data, though you'll have to customize things and log into many services again.