1. Go to Settings > Phone > My Number.
2. Replace the temporary number you find there with your own number - use +44 instead of the first 0.
3. Then tap Save.

Reset iMessage settings

Your iMessage settings won't reset themselves during porting - the temporary number will still be in your new iPhone.

To input your old number into your new iPhone:

1. Go to Settings
2. Tap on Messages
3. Tap iMessage ON
4. Scroll down to Send & Receive number
5. Replace the temporary number with your old number
6. Then tap Save.

That's it, you're all ready for action.

See more helpful tips on how to do clever things on your Apple iPhone 5 >