Newest 8100 OS v4.5.0.182 AT&T (Multilanguage)
BlackBerry Handheld Software v4.5.0.306 (Multilanguage)
Package Version: 4.5.0.306
Consisting of:
* Applications: 4.5.0.182
* Software Platform: 2.7.0.106
* File name: 8100M_PBr4.5.0_rel306_PL2.7.0.106_A4.5.0.182_AT_am p_T.exe
* File size: 93.13MB
NOTE: On the first screen you have to select the appropriate phone (Pearl 8100), and click the "Next" button. The newest OS is the first one to come up on the list which appears. (First is the multilanguage, second is the east asian)
It seems that they have rolled back the software platform from 108 to 106, even though the OS is upgraded.
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Upgrade Guide