I've had my Mesmerize since Nov 2010 and had it upgraded to stock 2.2 in the store. The phone was stellar running 2.1 but has been a headache running 2.2 (bluetooth issues, unlock issues, missed calls, flaky signal strength, no UI when powered, softer vibrate, etc.). I did a factory reset and then upgraded to 2.2.1 (EE19) via mini kies at home. The update fixed the missed calls issue, so it is actually a phone again. The other problems are annoyances, but the one that continues to confound me is the non-functioning UI when on A/C power. I use streaming audio while at work and need to keep the phone A/C powered. When powered, the touchscreen UI is unresponsive or erratic about 80% of the time. Unplugging the power fixes this 100% of the time. USCC's tech support recommends I do a complete reflash but I have been reluctant to do so. Anyone else see this problem? Any suggestions outside of a reflash?