I have a 7250 from Verizon and have had the No Data problem appear once only in 2 months that I have had it. It happened in an area that the service was bad. I took the battery out when I got home and reset it and have not had the problem happen again in two weeks, so I believe it was related to an area of poor cellular coverage. For so me reason in this area Verizon, Nextel, ATT all have problems so it must be something in the area that gives the towers a hard time.
BB Tour 9650
Running OS 188.8.131.524