Apple released watchOS 5.1 last week to reports that it was bricking Apple Watches. Shortly after they pulled the update.
Apple has released a new version, watchOS 5.1.1, which is expected to have resolved the issue. Unfortunately if you were one of the people that had their Apple Watch bricked it will not resolve your issue.
Apple is still advising you to contact Apple Support or bring it in to an Apple Store or service centre if you have an Apple Watch affected by the issue.
What was in watchOS 5.1?
The update allowed you to participate in Group FaceTime calls (limited to audio as the Apple Watch doesn’t have a camera).
Anything new in watchOS 5.1.1?
Apple Watch Series 4 automatically contacts emergency services if you are immobile for about a minute after detecting a hard fall. The watch will now also play a message that informs the responder that Apple Watch has detected a fall and shares your location coordinates when possible.
Fixes an issue that could cause an incomplete installation of the Walkie-Talkie app for some users.
Resolves an issue that prevented some users from being able to send or receive invitations on Walkie-Talkie.
Addresses an issue where some previously earned Activity awards were not showing in the Awards tab of the Activity app for some users.Apple – From Release Notes watchOS 5.1.1
Still no support for the ECG app but this will likely be US only on release.