I need to wait an hour for another train, but why wait at the train station?

It seems that mobile reception along German high-speed train routes has improved lately (at least compared to 2019). I’m sitting in an ICE 4 between Hanover and Hamburg, and I’ve initiated a speed test via USB tethering. My mobile phone contract is limited to 10 Mbps, but I seem to be able to take full advantage of that.