The Andorid 2.1 upgrade to my Verizon HTC Droid phone has rendered it barely usable. The worst problem is that after a full charge, my phone now will hold a charge only about 4 hours. If I use the phone at all, it's 2 hours. Before the upgrade, I could use it heavily for 6-8 hours before charging it. Because of the mobile nature of my work, this phenomenon makes my phone close to unusable--and I depend on my phone to get my job done.
To attempt to address this problem, I've re-installed the Advanced Killer App and set it to do what it was doing before the upgrade. But that didn't help.
I called Verizon support, and all they could tell me to do is turn off GPS satellite usage for maps. That didn't help.
There was another problem with the upgrade. When I was asked to allow the upgrade to occur, I was not warned that all of my settings would be destroyed. If I had been told that, I would not have allowed the upgrade. It took me easily 3 hours to put my phone back in the order it was in before the upgrade. I did all of that work, and now it operates worse.