My nexus one intermittently will not allow me to send outgoing sms messages or make calls while allowing both incoming calls and messages. I try over and over to resend the msg or make a call and with the msg is says "msg not send" and with the calls there is just dead air. I have min 3 bars and 3g connection and it just stops working with me not having moved location. This is my second unit having this problem...i got a new sim card..and called tmobile in hopes they would know clue..i can work around the problem by simply powering the phone off and on..but i would prefer a clear solution...anyone got a clue?