My phone was with version 2.1 of Android TMN. I performed the update to version 2.3.3 developed by MURAIk. I found it interesting but I did not adapt as was used with version 2.1. I tried to do the downgrade the original firmware using the TMN forum here. KDZ used the update but when rebooting the phone was locked on the screen of "ANDROID" and was in the loop. I tried several process but without success, the solution was to upgrade the firmware to support fastboot clean and updated again to version 2.3.3. I would like to know the correct procedure to downgrade to version 2.1.