iPhone 14 (US bought) can't send picture messages

[VickiTownend]

I have a iPhone 14 (US bought), I changed the region to UK and I have a UK ESIM. I can't send picture messages to another UK number, keeps saying 'Not delivered'

MMS messaging is turn on. 

[bristolian]

I presume your SIM is an EE-UK one.

Are you able to make & receive calls? Can you send & receive text messages? Can you use mobile data functions?

[VickiTownend]

Yes EE-UK SIM, yes I can send & receive text message, and yes use mobile data.

[bristolian]

That proves a network connection is in-place. I would have suggested installing the EE-specific config from https://setup-ee.wdsglobal.com/mms but they're not available for iOS. Over to the Apple experts on this board...

Is this problem specific to one number? Or general regardless of recipient?

[VickiTownend]

Any number it fails

[Ali_A]

HI @VickiTownend 

Can you go to Setting > General >  and check if there is a network settings update that is waiting to be completed? 

Ali