topic Re: iMessage not working after number port to O2 in Tech Support

iMessage not working after number port to O2

ClaireSt80 — Thu, 25 Sep 2025 19:28:00 GMT

Hiya

I hope everyone is having a great Thursday 😀

My number was moved from 3 to O2 this morning and since then i've not been able to use iMessage, RCS seems to work sometimes but it just has a mind of it's own. Everytime i click on my number a little circle just spins next to it until eventually it says activation failed. I spoke to Apple who told me to check if i had international SMS on my O2 account, O2 said yes i do have it, but Apple are saying that it's down to O2. I just was wondering if anyone else has had any issues like this and would know what to do?

Thank you

- Claire

Re: iMessage not working after number port to O2

MI5 — Thu, 25 Sep 2025 19:31:27 GMT

@ClaireSt80

Sometimes it takes a few days for O2 to update your number on the servers.

A couple of things to try.

1 - A simple reboot of your phone.

2 - Reset your network settings.

Re: iMessage not working after number port to O2

ClaireSt80 — Thu, 25 Sep 2025 19:33:58 GMT

Thanks for replying so quick 😁.

I've tried those things with Apple earlier, I'll wait a few days and try again. Do you think that RCS and iMessage will start working at the same time once i'm fully on the servers?

Re: iMessage not working after number port to O2

jonsie — Thu, 25 Sep 2025 19:40:21 GMT

I would suggest you ask customer service to enable iData on your account

Social media may be your best option apart from X(Twitter)

Re: iMessage not working after number port to O2

ClaireSt80 — Thu, 25 Sep 2025 19:42:13 GMT

Ok I'll give that a go tomorrow. What exactly is iData if you don't mind me asking?

Re: iMessage not working after number port to O2

jonsie — Thu, 25 Sep 2025 19:49:10 GMT

iData is needed for the APN setting

iMessage and visual voicemail won't work without it

Not sure about RCS to be honest, I think that's an O2 server setting which will probably update after your phone is fully registered on the servers

Re: iMessage not working after number port to O2

MI5 — Thu, 25 Sep 2025 19:49:16 GMT

@ClaireSt80

iData is what tells the system you are using an iPhone.

Have you checked your number in Settings >Apps >Phone >My number?

Re: iMessage not working after number port to O2

ClaireSt80 — Thu, 25 Sep 2025 19:55:57 GMT

Thanks for the info guys, I'll get on to customer service tomorrow. @MI5 I checked my number earlier and it is the number that was ported in from 3 today, I'll just give customer service a call tomorrow and see what they say.

Thanks for all of your help 😀

Re: iMessage not working after number port to O2

ClaireSt80 — Thu, 25 Sep 2025 19:56:48 GMT

Visual voicemail is working last time I checked, I'll just get on to customer service tomorrow 😀

Re: iMessage not working after number port to O2

MI5 — Thu, 25 Sep 2025 20:24:09 GMT

@ClaireSt80

If your VVM is working, you are setup OK already.

Just give it a few days for your number to update.