Set up your mobile phone for internet
Choose a network
Restart mobile phone
Choose network mode
Write and send SMS
If you have problems sending and receiving email, you can delete the email account from your mobile phone and then set it up again.
Find "Accounts & Passwords"
Tap Accounts & Passwords.
Delete email account
Tap the required email account.
Tap Delete Account.
Tap Delete from My iPhone.
Return to the home screen
Tap the Home key to return to the home screen.
Tap anywhere to dismiss
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