To transfer contacts from one iOS device (iPhone or iPad) to another:
- Use the same apple ID on both devices.
- Go to Settings > iCloud on device 1. Turn on ‘Contacts’.
- Go to Settings > iCloud on device 2. Turn on ‘Contacts’.
- Make sure both devices are connected to the internet.
- Open the contacts app on device 1 and tap the ‘sync’ sign in the top left.
- Repeat step 5 on device 2.