I've subscribed the unlimited internet service, 36 euros/month. But I found this service is not quite stable. Sometimes the internet is so slow that I can not watch youtube with the lowest quality. I have to wait for the buffering for a long time. Such bad experience happens frequently. I checked my daily limit and I am far from my 5Gb daily limit. It is my first week using the plan and I am deeply disappointed. I hope T-Mobile can make it up.
I don't know what to do with such bad network. I don't want to suffer from it for the following 12 months.