I gave my Series 3 to a friend who had recently broke the screen in her Series 3 (I'm using a Series 5 so the 3 is just taking up space) and I'm having issues with the reset and re-pair procedure (which is needlessly messy compared with a Galaxy Watch)
It took many attempts to reset for one, I'd enter my PIN and hit erase all, and nothing would happen. An hour later, it started resetting. Great. Now when she tries to pair to her new iPhone 11 Pro, it has an activation lock (I never set that up!!!) which forces me to enter my Apple ID into her phone. Then it tries to update to WatchOS 7. (I don't want it to update and neither does she) So I cancelled it. It is now stuck there now.
Now I am not sure what differences exist between the 11 Pro vs. my lolely modified 6S (with updates blocked and it never forced a WatchOS update when I used it a year ago!) but it seems odd it wants to update WatchOS when the same iOS version is running on my 6S and her 11 Pro and obviously the watch paired to my 6S running WatchOS 6 so it should just work or is there more to a reset and re-pair than I thought? Makes me want to consider just buying a new Apple Watch if I ever had to replace my iPhone for any reason!
It took many attempts to reset for one, I'd enter my PIN and hit erase all, and nothing would happen. An hour later, it started resetting. Great. Now when she tries to pair to her new iPhone 11 Pro, it has an activation lock (I never set that up!!!) which forces me to enter my Apple ID into her phone. Then it tries to update to WatchOS 7. (I don't want it to update and neither does she) So I cancelled it. It is now stuck there now.
Now I am not sure what differences exist between the 11 Pro vs. my lolely modified 6S (with updates blocked and it never forced a WatchOS update when I used it a year ago!) but it seems odd it wants to update WatchOS when the same iOS version is running on my 6S and her 11 Pro and obviously the watch paired to my 6S running WatchOS 6 so it should just work or is there more to a reset and re-pair than I thought? Makes me want to consider just buying a new Apple Watch if I ever had to replace my iPhone for any reason!