Update your number
- Go to Settings > Phone > My Number
- Replace the temporary number you find there with your own number - use +44 instead of the first 0
- Then tap Save
Reset iMessage settings
Your iMessage settings won't reset themselves during porting - the temporary number will still be in your new iPad.
To input your old number into your new iPad:
- Go to Settings
- Tap on Messages
- Tap iMessage ON
- Scroll down to Send & Receive number
- Replace the temporary number with your old number
- Then tap Save
That's it, you're all ready for action.