My old phone died so I can not unpaired. How can I pair my watch with new iPhone
You led phone died. So ca not unpaid. How to pair with new phone
iPhone 7, iOS 10.2, Iwatch
Hi
On your watch, go to: Home screen (via a single press on the Digital Crown) > Settings (cog icon) > General > Reset > Erase all Content and Settings.
Then pair it to your new iPhone via the standard process (choosing to Restore from Backup, if offered the option):