The passcode is one of security features on the Apple Watch. Apple Pay will lock and require a passcode if the device is removed from your wrist. I had setup a password for that and turn both of the Unlock with iPhone and Wrist Detection On. I tried pulling it even tighter as well, so I can easily see if it made any difference while it should stay that all day. However, the Watch believes it has been removed and keeps locking itself while on my body. How can I fix the issues?
Many people are reporting that the Apple watch will lock itself once you have tattoos on the area where the watch is wore on. Doing a rebooting and re-pairing the device, or doing a restore but it still locks constantly. You could try the tips below to resolve the problem.
* By this method
1. First remove the watch from your wrist, and then enter your passcode to unlock the device.
2. Attached the watch to your wrist again.
3. Then go to your iPhone, tap Setting from the Home screen, go to Turn WiFi off and then turned it back on. Everything should be working fine.
* Unfortunately, the another fix for now is disabling the passcode while this is not an acceptable solution. Because it will lack of wrist detection function, when you are wearing the watch on top of the wrist.
Hopefully an ultimate solution comes.