cannot send or receive text messages or emails or whats app on iphone, texts show not delivered.

[Big_T]

Data works.  Just cannot send emails.  Emails are received but cannot be sent.

[hTideGnow]

hi @Big_T 

email is just an app that uses data.  If data works, email should work unless you have problem with your email server

reboot the phone, reset network settings.  And if Android, also clear cache

then try again