Even if your Apple Watch does not have as much personal information as your iPhone, it's still a good idea to set a passcode for it and lock it if you're not using it. If you do not do so while you charge or otherwise dispose of your wrist, others may be able to glimpse your activities, messages, emails, and other personal information. Plus, you can not use Apple Pay without one.
There's only one problem with protecting your Apple Watch with a lock: someone could easily handle it. However, this only applies to thieves who only reset the Apple Watch and then connect it to their iPhone instead of theirs. Of course, this could be prevented by making sure "Find My iPhone" is enabled on your paired iPhone, which also protects your Apple Watch.
Still, it's still a good idea to lock your iPhone to keep curious friends (1
9659002) Since there are many options depending on the scenario, you can use the following speed list to navigate directly to the section you need. We used Verizon Wireless' Apple Watch Series 3 (GPS + Cellular), but the process is identical to the latest watchOS for all Apple Watch models.
You must have the passcode Set your Apple Watch to complete the process. If you choose a four-digit passcode, just enter it and confirm it again. That's it. For those of you who would like a longer access code, enter your access code and tap "OK". Then enter again on the next screen and then tap "OK" again.
When you're done, "Wrist Detection" should be automatically turned on, so every time you take your Apple Watch off and the passcode is asleep