Hello. I posted last week about not being able to access WhatsApp on my iPhone X. No joy in solving the problem. I have been into the O2 shop twice and they’ve been stumped. WhatsApp suggested it may be a APN problem (?). I have also noticed Siri does not work and my BT mail account is struggling on 4G too. The BBC website is fine on 4G.
Just a thought, but I changed my O2 password recently for my account details - May this have affected the data access? I’ve noticed when I look at the mobile data on settings it mentions something called ‘vertigo’ and the passwords are asterisked out but I can tell by the number of * that it is not my new password. Any help and advice gratefully received. Thank you. Crock
The password for the APN is not your account password it is a generic password
Follow the walk through here
Just reset your network settings and the correct O2 apn will be applied.
I'd contact Apple to get a diagnostic check run on the phone.