I didn’t think about it and no one at the Apple store told me to unpair my watch from my old phone before setting up the new phone and wiping the old one. When I restored from the most recent backup (today) I had zero activity history. The next most recent backup it shows is from January. I have sleep tracking apps that use the watch to track my sleep that have all my history but the activity app doesn’t. What a bunch of BS. And if you have to unpair from an old phone before setting up a new phone then store employees should make sure to inform you of that. I’m sure a lot of non-techie people wouldn’t even give their watch a second thought. Also when your phone backs up to iCloud does it back up activity data? If so why wouldn’t that transfer when you restore from backup?