This happened to me today I am not sure what you can do. So do not take my advice since I have not tested and stumbled across how to resolve my phone.
I posted this in another thread:
I came upon this accidentally I was trying to add songs on my device through the DM and an update to my software was available so I said why not and proceeded. All went smooth and 10 of the 12 steps were finished but either my DM or blackberry were frozen. I did a quick search and it told me to wait it out and the process could take up to an hour. So I waited an hour, which then turned to 2, which got me really steamed. I then came across another thread that said that the guy just unplugged his device, did a battery pull. Then the device would work fine. Boy was I wrong. When I did this, after the blackberry loaded I got an error called App or Error 23 reset. I then googled that and it turns out I screwed up the update process blah blah blah. So I seeked out how to fix this and came upon rl_cdmer and was advised to wipe my phone clean. Did that and turns out it wiped my OS too! ****! I then proceeded to follow the OP's advice on downloading and installing the OS v126.96.36.1991. It worked! And it only took 7-10 minutes since my phone was already wiped clean. So there was no clutter and data to ruffle through. Luckily I backed up everything beforehand.
This did take me 2.5 hours but I had fun while being pissed off lol
If I were to do this again// I'd go these steps
-backup everything on DM
-rl_cdmer wipe my entire phone
-install latest OS
-lastly, when phone is functioning correctly, restore
It should take 10-15 minutes, again I have not tested this, so try at your own risk. rl_cdmer in my opinion will make the install much faster. Instead of going through 45-60 minutes of torture!
In turn I had to wipe my phone and download/install a new OS after unplugging usb after 2 hours and did a battery pull.