I was contacted concerning the problem you're having with the OS for your 9700.
What I did is I did a full wipe then reinstalled (download BBSAK at www.bbsak.org this is a bit of software that can fully wipe your Blackberry, make sure to make a backup first!).
When wipe is done, your device will give a white screen and a 404 or 505 error. This is fine, just hook it up to you desktop manager and install OS of your liking.
I had the same problem, and lost my complete list of contacts. If it still gives the error, all I can advise is to install a different OS. Keep in mind that Mobilicity is ussualy an Asian language pack, I would try an OS from a different operator / carrier. This depends on what country your from and what languages you want to use.
Hope it helps, if you need any help please let us know.