Faintly similing as usual with a bit of sarcasm over the worthless Wi-Fi Internet access in Thalys trains I noticed that French and Belgian network operators have made their homework in recent years and have installed 3G network coverage along the high speed train line. So I turned off the lousy on-board Wi-Fi and switched over to 3G to see how it fares at speeds of 300 km/h.
To my surprise it did really well. In most places between Paris and Brussels, I could get speeds of around half a megabit per second and web surfing and emailing felt hyper-fast. Only a slight hassle: At this speed you don't see the border sign between France and Belgium, i.e. you don't quite know when to reselect to another network.
There are two take aways from this: The first one is that this proves that UMTS works well at 300 km/h. And the second: Where there is a will, there's a way (and coverage)!