How to upgrade to ICS 4.0.4 -- Also OPTIONAL How to root ICS 4.0.4

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http://androidforums.com – All of the following info I used to install ICS and root my phone. All is borrowed from XDA site To upgrade to ICS 4.0.4 (latest ICS build as of 5/8/12) Download: Build UCLE2 for AT&T Samsung Galaxy S II Skyrocket - BriefMobile To install (this WILL wipe all data, so back up your files) Download file Open file ODIN Turn off phone - pulling battery is fastest Plug USB into the computer - do not connect your phone yet Hold the Volume up&down buttons(do not press the power button), and plug the USB cord into phone - this will get you into download mode Once you see the download sc (General)