I was travelling around Germany and was looking for an eSIM solution for data roaming, I found ZIM@SBB. Thinking when Swiss railroad would recommend that, it would work, but for my trip around Germany, mostly southly of Stuttgard, most of the time it did not. As I had a few 100MB data roaming left on another prepaid SIM, I had to switch back to that, and surprisingly, that worked most of the times when I needed Internet connections out of cities. I got back to the support. Of course, not really anything useful came back not even a goodwill refund. I'm done with ZIM connections, next time travelling I'll rather try any local (e)SIM solution.Addendum in August: I have now switched to Saily eSIM and, after some initial difficulties, discovered that the APN was not set correctly in the Network Manager. These settings can be found on the Saily support pages, but nowhere on the ZIM website. I suspect that the connection problems I had in Germany at the time were also due to an incorrect APN configuration. When asked about this again, ZIM apparently does not feel it necessary to provide an answer. For me, ZIM is definitely not to recommend!
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