If you want to install the latest Android 4.4 KitKat custom ROMs on the T-Mobile Galaxy S2 SGH-T989, you MUST have the latest CWM Recovery 22.214.171.124 or later.
If you don’t, your install will simply fail.
So, how to update?
I made it really easy for you guys so all you have to do is install a zip file using your existing CWM Recovery. Once installed, simply reboot into recovery and you should see CWM Recovery 126.96.36.199.
And yes, this CWM recovery is backward-compatible so you should be good to go for installing all types of custom ROMs.