Watch Ultra 1: ESIM did not work after 10.01 (German Telekom)

[Zahni]

I was on the road yesterday with my Watch Ultra 1 and was surprised to find that cellular did not work. In the settings it still showed the two switches and 2 (!) missing ESIMs. After a restart, the two switches were gone and only one ESIM was missing. At home, it was then impossible to import a new ESIM online. There were errors (server unavailable) or after a restart of the Iphone the ESIM was not retrieved final. I had to set the Watch first to factory settings, which also did not work on the 1st attempt: The process was not completed and the Watch became warm. Only after a forced restart it worked. After the fresh setup, the ESIM was downloaded without problems.