I have an HTC Droid through Verizon. I got mine when it first came out.
It was hard to get used to and had some quirks and freezing up. I was told by Verizon to download the "update" not long after I got the phone. It took 2 hours to down load and made the problems worse.
Some problems I have experienced.....
self dialing
pressing to dial one phone number and it dials another
locking up when trying to receive a call, respond to text messages, place a call or when dialing.
Erasing old text messages will lock the phone up
Using the internet it will just shut down
Trying to use phone prompt systems was impossible without an application called SCREEBL that would keep the screen illuminated.
Not able to talk on the phone and use any internet applicatiosn at the same time.
When the phone turned exactly a year old it got even worse. Everything slowed down. Its impossible to text message now. I am convinced it must have some kind of virus.
My best bud got his at the same time and got rid of his for a Thunderbolt which is minimally better.
I am getting an I phone next time. Screw this Droid crap!