For those of you wondering how to root your T-Mobile Galaxy Note SGH-T989, you can use the AT&T root method as hardware is identical to the AT&T SGH-i717 version.
As for custom ROMs, please do not flash AT&T Galaxy Note ROMs. Users have reported success though that custom ROMs work fine so long as you flash T-Mobile modem back on after flashing ROM on Touchwiz-based ROMs. CM9/CM10/AOKP/AOSP ROMs are not working though so don’t flash it!
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You will need a rooted Galaxy Note to install all ROM/kernels.
NOTE: If you are a noob, please remember the author of this site is not responsible if you mess up your phone. Make sure you know what you are doing before following any instructions on this site!
First time to rooting and custom ROMs? Please see our Galaxy Note Root Guide FIRST!