This morning my 2820 lost GPS signal and never recovered. I called Garmin this evening and the tech talked me through up dating the software and resetting it. This had no effect on the 2820 locating the signal. The tech said Garmin doesn't work on the 2820 any longer and he offered to upgrade me to a Zumo550 for $179.00. I told him I'd think about it and call them back if I wanted to to it. A quick check of ebay revealed 550s for $574 to $700+, so after another call to Garmin and the pain of giving them my credit card, I'll have a new Zumo. I have to box the 2820 up and ship it to them. They'll turn a 550 out to me after that. I don't know why they want the 2820 if it's no good to them. Maybe just to make sure I don't have it either.