T-mobile from Germany works fine. I purchased one in the T-Mobile store in Marienplatz plaza area in Munich. They charge 10 euro for the sim and then you can add 10,15 or 30 euro for pay as your go. I had my Galaxy SIII from Verizon but the SIM lock is on so I couldn't use it. Luckily, I had my backup phone that is unlocked and it worked fine. Since Munich has old buildings the cell phone reception is not always 3G or H speed. Otherwise, it works great!