I have a windows phone (Samsung Focus S) on Straight Talk. It was working perfectly until yesterday. Now all of a sudden, none of the Windows functions work unless I'm using wifi. (Examples: I cant post a status update from the people hub, I cant use the search function in the Internet Explorer app, I cant download anything from the Market unless on wifi, etc.) I have checked the APN settings on both the Straight Talk website ( apn.straighttalk.com ) and the MMS Settings on ( straighttalkwindows.com ). Can anyone help me figure out what's wrong? I really don't want to reset my phone, so if the problem can be resolved without doing that, that would be great! Thanks so much guys!