Help pairing Apple Watch with new iPhone 16.
I can’t pair my Apple Watch with my new iPhone 16. The watch was previously paired with my old iPhone that I traded in.
Apple Watch Series 8, watchOS 10
Question marked as
See the section How to erase your Apple Watch if you don't have your iPhone here: Unpair and erase your Apple Watch - Apple Support
Once un-paired and erased, and then set it up as normal.
When transferring or trading an iPhone, un-pairing is part of the Apple-suggested procedure, so you may well have already performed that step: What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support
If the Watch was already un-paired and is not re-pairing, please describe what else you have already tried, and what symptoms or errors are arising.