The B042 identifier indicated a minor revision within the 7.1 branch. Changes from B039 to B042 included:
: Allows you to use your BlackBerry device as a wireless modem for internet access on your computer. blackberry desktop manager 710 b042 multilanguage
A lifesaving feature. It created a single .ipd file (IPD = Internal Backup Database) containing all device data: messages, settings, passwords, and service books. Build B042 notably reduced the “Data mismatch” errors common in earlier builds. The B042 identifier indicated a minor revision within the 7