Just changed from VM to O2, visual voicemail isn't working

[icliddle]

Will I have to activate visual voicemail on an iPhone after changing from Virgin mobile to O2?

Also iMessage isn't verifying the number in Messages?

Thanks in advance

[Enlli]

You will need to ask them to enable iData on your account

[Breanna]

Were you able to get this sorted @icliddle? iMessage sometimes takes a week or more to activate.