Open the Apple Watch app on your iPhone and tap the My Watch tab. Tap your watch name at the top of the screen, then tap . Tap Unpair Apple Watch. For Apple Watch Series 3 (GPS + Cellular), tap Remove [Carrier] Plan. If you aren't going to pair with a different Apple Watch or iPhone, you might need to contact your carrier to cancel your cellular subscription.* Enter your Apple ID password. If you forgot your Apple ID password, you can reset it. Tap again to confirm. read more