Just got my Hero last night from Best buy with that nice little coupon! Great device so far, except that I cant send SMS at all. I can receive them though. I tried sending with the built in app, as well as HandCent. When sending with the built in app, I get this error: Cause Code 97 Error Code 2 I have tried updating firmware, PRI and PRL. Also rebooted the phone. Nothing makes it work. Anyone have ideas what I can do to make this work?