Cause 7 of 9: Mobile data is turned off on your phone
If you're trying to access the internet using the mobile network, mobile data needs to be turned on on your phone.
Solution: Turn on mobile data.
Find "mobile network"
Press mobile network.
Turn mobile data on or off
Press the field below "Data connection".
Press on or off.
Return to the home screen
Press the Home key to return to the home screen.