For those of you who want to unroot or unbrick your T-Mobile Galaxy S2 SGH-T989 back to Android 2.3.6 for whatever reason (maybe bricked or want to take it back for warranty), here’s how to do it.
UPDATE: There’s an unroot method to ICS, please see How to Unroot/Unbrick to ICS on T-Mobile Galaxy S2 SGH-T989! *Note – You will need a Windows-based computer, does not work with Heimdall on Mac or Linux.
Step 1. Plug-in a micro-USB ca