@apablasa Welcome to Community! I moved your post over to this existing thread: Apple Watch: Endless buffering If you haven't already, please check these steps: Apple Watching Troubleshooting. If you have tried and continue to have this issue, can you tell me a bit more information about your watch and phone? What iPhone model do you have? What version is your Apple Watch on? (Open the Watch app on your phone and go to General > About> Version) Does your Apple Watch have a cellular data plan? Let me know how it goes. ... View more