No Data Connection on Cellular Apple Watch Series 6 (watchOS 7.1)

I am having the same issues with my Apple series 6 watch. I can connect to cellular in my home but have no data connection. I am able to receive and make calls however. When I am a 1/4 mile from my home I can stream music. When I return home the data connection is still good. What is interesting is I have a Series 3 with cellular on the same T-Mobile plan that can pull data when I am in my home. I believe the issue with the Series 6 happened soon after I purchased the watch and updated the watch software. Apple support was as helpful as they could be but no solution has been found. T-Mobile support could not solve this issue either. Otherwise a great watch. Might consider changing carriers.

another one with the same case well both my wife's watch and mine. both were working fine sinc ewe got them last year and lately we have the same error conditions as others here

if i remove the plan and add it it works for a little while but after that it goes to the same error as shown above... did diagnostic with apple and they could not find any issue. waiting on t mobile to see what the problem could be

I have the same issue on T-Mobile. Watch shows cellular signal, but "No connection" until I get about 1/2-1/4 mile from my house and then a toggle of cellular off/on will bring it back and it will then work all the way back to my house until I disconnect again. T-mobile escalated a ticket twice and essentially said they give up. So frustrating as everything working fine the first two months I had the watch. This a series 6.

I have the same issue. Just got a Series 6 watch and when I am at home I can connect to cellular and receive calls but that's it. If I try to use Siri or anything it says there is not internet connection and the status shows not connected. I am on T-Mobile as well. I was heading back to the store and tested it when I got away from house and it started working even though it said it wasn't connected. I only show one dot of signal on the watch so maybe it doesn't have enough of a signal to do internet? Either way it is frustrating. I have also had it in placed it was working then it would stop. If I turned cellular off and back on it worked. It's frustrating to say the least.

Just took the watch back to T-Mobile for a full refund. I don't see the point in having a cellular watch when I have to guess when it will and will not work. Wanted it to be able to take walks without the phone but apparently I don't walk far enough away from my house.

Problem solved, changed carriers.