International Roaming problem for Apple Watch eSIM

SoCal wrote:

I have an Apple Watch Ultra 2 with T-Mobile eSIM on the international roaming service. My phone works fine on international roaming while travel to Singapore and China. While the watch never response, keeping showing loading with T-Mobile. Does anyone know the answer? Thanks

I also faced this same issue with my SIM when I moved to Sweden. I searched many websites to solve this problem and found one that might help. Check this out to see if it's useful for you: https://tmsimregistration.info/