http://wccftech.com/downgrade-watchos-4-gm/

watchOS 4 GM is now available to download for developers and it’s just a matter of days till the final release is out. But the big question on everyone’s mind is: can I downgrade watchOS 4 GM back to watchOS 3 somehow? Long story short, no. Here’s why.

The Apple Watch is a wonderful little product from Apple and serves as a perfect extension to the iPhone. But there are certain downsides to it too. For instance, you have little to no control over updates at all. Sure you can delay them manually, but once you update to a new version of watchOS 4, there’s no going back at all. This is not the case with iOS devices or even the Apple TV. If Apple is signing an older version of a firmware, you can simply download its image, restore using iTunes, and you’ll be back in business in no time.