Error 523 is usually cause by an app that is causing issues on your device or is incompatible with the OS. Do a battery pull....Once your phone comes back on, I strongly encourage your to back up your phone AND 3rd party apps, then attempt to upgrade.
wew.. seems like i need to upgrade my BB firmware hurry..
thanks for your advice, thank you very much..
all of ur stuff help me much to learn more about BB
thanks for this forum, for all user that replied my thread.