1. Check to make sure it has power:
• If plugged in, unplug and plug back in the phone’s charger
• Make sure it has enough charge
• Make sure the power outlet is working
2. Power cycle your phone:
• Hold down the power button for 10 seconds until the device shuts off.
• Wait 10 seconds after the device shuts off
• Hold down the power button until your device turns back on.
3. Ensure the phone is not in airplane mode:
• Swipe down from the top of the home screen
• Make sure that Airplane mode is disabled
4. Reset your Network settings:
• Go into your Settings > System settings >reset Network settings
• Confirm the reset