Donut installed on Sunday. G-1 was fine on Monday. Calls dropping like crazy on Tuesday and phone noticeably slower. Wednesday: disaster. Calls go straight to VM; no sounds coming from phone, home button does not work, etc. Discussed with T-Mobile Cust Srvc and turns out that I had to wipe the phone. Luckily, MyBackup Pro was installed so I could easily back-up my system. Phone working perfectly (and faster) for 24 hours...and then similar problems: incoming calls routed straight to VM, home button doesn't work, etc. Forced to wipe the phone yet again! T-Mobile is sending me a new G-1, but I'm curious if anybody else has had similar problems and wondering if there is anything they've discovered that is a quick fix. Thx!