I have the same problem. Been onto customer services a few times and can't be bothered anymore.if somebody from VM wants to pm me, please do so. My apn settings are correct and everything is switched on. I think I need a new sim, as been like it since I moved from 3g PAYG to 4g contract
I had the same problem.. Phone VM and spoke to a nice lady who said there was a fault with the sim's card so she said she send a new one out .. receive it 2day later put it in my phone and this worked perfect, this was 5days ago.. so phone VM and ask them for a new card.....
I had this problem last year when I switched to a 4G plan. If I remember rightly, they fobbed me off a bit over the phone, but I posted on here about it and got a member of a seemingly very capable team call me that evening and fixed it literally within about 10 minutes. I think they reset my data connection at their end or something (can’t claim to know all the ins and outs!).
I have finally managed to get the mobile data working on my sons iPhone. It was something to do with the Onavo data monitor profile. I removed the profile, but kept the app on the phone with it running.
All sorted now. Thanks for all assistance given. Lesson learnt 🙄☺️