Hi. I just bought a new Blackberry 9900 and the OS is 7.0.0.2290 .

I plan to install the OS 7.1.0.523 and may I know what is the difference between this two OS , will it drain battery more faster ?

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Added on November 29, 2012, 6:12 pmI just updated to OS 7.1.0.523. I felt that the line not stable , keep dropping and showing S.O.S.

Anyone can help

This post has been edited by limhongwoon: Nov 29 2012, 06:12 PM