How do I factory reset my Apple Watch Series 2?

Erase Apple Watch and settings
  1. Open the Settings app on your Apple Watch.
  2. Go to General > Reset, tap Erase All Content and Settings, then enter your passcode. If you have an Apple Watch with a cellular plan, you’re offered two options—Erase All and Erase All & Keep Plan.

How do I reset my Apple Watch 2 without my phone?

Connect your watch to its charging cable, with power connected. Press and hold the side button until you see the Power Off slider. Press firmly on Power Off (do not try to slide it – just press down more firmly than a normal tap) and then tap on Erase all content and settings.

How do I manually reset my Apple Watch?

How to Hard Reset Apple Watch
  1. Hold down the side button and Digital Crown at the same time. The Digital Crown is the rotating button located on the side of the device.
  2. Keep holding these two buttons down until you see the Apple logo appear on the screen.