Good news! here is the oficial OS 5.0 for ours blackberry's 8900!!
Software Download for Optus Mobile Pty Limited
https://www.blackberry.com/Downloads...4E92D025A75D1F
Software Download for Vodafone DE
https://www.blackberry.com/Downloads...374C8919D2074E
Software Download for Vodafone Spain
https://www.blackberry.com/Downloads...BFCBB00C48F133
Have good luck and remember make backup of yours phones!