Question about RIM BlackBerry 7290
507 means your phone thinks it has no operating system on it.
you need install Desktop Manager. then connect bb. open application loader from DM -> install OS to your phone
PS:must remove vendor.xml in Program files on computer. Dwonload the DM from this link: http://na.blackberry.com/eng/services/desktop/ Or go to your provider's website and download it from there. And read this link: http://crackberry.com/blackberry-101-lecture-12-how-reload-operating-system-nuked-blackberry Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Posted on Jun 22, 2009
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Posted on Jan 02, 2017
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