Some weeks ago I got my brand new free software Palm Pre from Germany (from O2). I put my SIM (Yoigo) and it worked well some days. I had 3G internet connection and at home wi-fi as well. Now I don't have 3G, I try to put "Only 3G" "Only 2G", Auto-Select Network but noting change. I can use Wi-fi, but I have no network without Wi-fi. I don't know if I did something with my phone.

Anyone have any idea how can I switch on my 3G?

Thank you,