Having recently updated to IOS 5 on 3 iphone 4 phones, one phone (the one with the Giffgaff SIM in) is having a problem with iMessage. Texts sent from it are appearing to be sent from the SIM's original number, not the active phone number (ie one that has been PAC'd across).
Sending texts to the PAC'd number results it the text being sent via SMS.
Does anyone else have this problem? All other functionality is fine.
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I also had a similar situation - you cant change the number in imessage settings, it has to be changed in phone settings (this is a global setting).
My wife had her iphone 4 on Voda and the "my number" still referred to that (when she sent me texts, it appeared to come from that number, even tho she is now on the O2 network). When I changed it, all was well, but it took a few minutes for the settings to take effect.
On my 3GS, my "own number" was correctly set, but in my contacts, I had a contact for myself and the number was listed as "mobile" rather than 'iphone". When I changed it to the latter, all was well with imessage (again, after a little wait- I initially did not think it had worked).
Hope these experiences help anyone else setting up the new toys in ios5
I had this problem this week too. Using the phone and sending text messages have been fine but I have been sending iMessages without realising I was using the temporary GiffGaff number. Don't ask an agent as you will wait 24 hours to be told to post your message in the community.
I finally fixed it - as uw_photographer says above. This is what I did:
1. Go to Settings
2. Select Messages
3. Under iMessage look at 'Receive At'
4. Click Addresses > is the number shown incorrectly here? Is it greyed out too?
If yes and yes:
5. Go to back to Settings > Phone
6. My Number is now editable
7. Edit and save your number
8. Go back to Messages > Receive At
9. Notice is is now verifying > Once this is finished it should work fine on your ported number.