[tsac]

I had many models and although I did have some issues most were due to the carrier either dropping calls or causing something to prevent a call. I have had App issues that caused problems.
You did not give any information except to say it was hanging. Hanging how? no call ability? wont run an app? What model Curve? Correct OS for the phone? purchased used? Details will help you get information unless you are just posting to push people away from BB to some other phone. Buy an I-Phone and see if it's any better. When you discover any phone can have issues post back. You might also get a real cell carrier other than IT which does not seem to exist.