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Message: <blockquote data-quote="chris" data-source="post: 2421385" data-attributes="member: 208377">Can anyone tell me how I can upgrade my Blackberry 8900's OS 4.6 to the latest one that has the threaded texting. I've literally tried about everything. Like I've downloaded those files from crackberry and everything, and installed them. It doesn't seem to show up on my Blackberry Desktop Manager, instead I found all the .alx files in: C:\Program Files\Common Files\Research In Motion\Shared I've tried like importing them using the Desktop Manager and the Loader program you'd find :C:\Program Files\Common Files\Research In Motion\AppLoaderAdditional info, I don't have internet subscribed on the phone if that makes a difference</blockquote>