I am currently having a huge problem. After coming back from the States with my Treo 600 I put in my tmoblie germany simcard and sometimes I have service and sometimes I dont. And even when it says I have service when someone calls me it sends it directly to my voicemail.

I put my girlfriends (02) germany simcard in my phone and we have the same problem. But when I put my simcard into another phone it works fine.

Can anyone help me or give me any advices or suggestions??????