I use the Bold 9700. 2 times my phone has hang. I do not remember what I did before my phone hangs. What is clear, after I did input the password, can not do anything directly. On screen it appears there was a black box but not full screen, with the background is the wallpaper.
I've done pull the battery, but the phone remains in this condition. Mobile still can receive the phone. Can also receive an email, sms and messenger but I can not open or read.
I decided to upgrade the OS and mobile phones to be normal as usual.
What should I do if it happens again.