I made the mistake to start a subscription with T-mobile at the end of August. Soon I realized that their data network is rubbish: in the place where I live (in the center of a 15000 people town), I get between zero and a few kbps (but mostly zero): I can not even check the subject of my e-mails, completely useless; nevertheless  on the web site of T-mobile the area is specified as covered properly. Within the first week, which according to the European regulation allows a customer to cancel a contract, I phoned the call centre to perform the cancellation; I was told to do this in the shop where I signed the contract; I had to drive far from my work and during working time in order to do it; I got a receipt of the request; I kept on wasting my time testing if it was a temporary problem but after two more weeks I was convinced that it was impossible to hope for more than nothing from their network; I got an sms asking me to call the call centre which confirmed that there was no temporary problem; I confirmed to the call centre the request to cancel the subscription many more times but nothing happened; at the beginning of October I sent a fax (you have no address, only the useless call centre or the fax number). I got no reply, it is clear that they try to exhaust you by refusing any contact except with the call centre which can not forward you any responsible, useless as their network.

How is it possible that this kind of pirates are allowed to sell what they never deliver?
What are the authorities doing? Why nobody is checking how customers are treated?

I have lost many days in testing and calling, and I will loose even my phone number if I succeed in cancelling the subscription.

Stay away from T-mobile.