Just downloaded 4.2.2.312 (Multilanguage) for the AT&T 8310.
https://www.blackberry.com/SoftwareD...ient=Rc4cZBaBN
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BlackBerry Handheld Software v4.2.2.312 (Multilanguage)
Package Version: 4.2.2.312
Consisting of:
* Applications: 4.2.2.170
* Software Platform: 2.5.0.30
* File name: 8310M_PBr4.2.2_rel312_PL2.5.0.30_A4.2.2.170_AT&T.e xe
* File size: 78.56MB
Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld.