I have a new iPhone, because my old iPhone was damaged, how do I paired up my new i watch with the new iPhone?

You can unpair your watch from old, damaged iPhone:

1. Go to Settings -> General -> Reset and select Erase All Content and Settings and tap it again to confirm.
2. Wait for your watch to unpair.
3. After your watch unpairs completely, you can pair again. You'll need the Apple ID and password that were used to set up your watch.