my handheld shown "device error: 400" everytime i turn it on.
i've try to restart handheld but that error message still shown,so i cant use my handheld anymore.
anyone can solve this problem?please help....

ur BB is nuked!
heres what you do..
download the latest blackberry SYSTEM software from your carrier
(im assuming that you have the desktop manager installed in your pc)
usb cable at the ready...
connect ur device to ur PC using it
install the system software to ur pc (d-click on the file that you just downloaded) and let it do the trick, it'll ask to confirm that your data will be erased.. go ahed)

(just in case that it'll not be succesfull..
email me.. jazpaw@gmail.com)

Goodluck :)