QUOTE(prozai @ Jun 27 2011, 05:24 PM)
hm...so i use motrola updater now tp upgrade to 2.2???
but seems like 2.2 is not downgradable???
argh so blur

why should you downgrade it since it is the official 2.2 stock rom? if you wanna downgrade it,then just use the method "nandroid restore + fixed sbf"
Procedure
1.Download nandroid of your choices,be it Nordic(most popular cause used by CM7/Miui) or just like me using the SEA version.
2.Download fixed sbf of Nordic/SEA (Both nandroid/sbf must be the same=Nordic nandroid+nordic fixed sbf OR SEA nandroid+SEA fixed sbf)
3.Copy the nandroid to sdcard/clockworkmod/backup/
4.Download & install RSD lite 4.9 to your COMPUTER (http://forum.xda-developers.com/showthread.php?t=966537)
5.Download & install superoneclick to your COMPUTER to root your phone. (http://forum.xda-developers.com/showthread.php?t=913709)
(Run the superoneclick in admin mode if you are using WIN7)
6.Download & install 2ndinit to your PHONE,use the version 1.4_2 cause it's the most stable version. (http://forum.xda-developers.com/showthread.php?t=1032212)
7.bootup the phone after installing the 2ndinit,you will directly enter the 2ndinit mode,go to recovery>custom recovery> THEN wipe cache & wipe data.
8.Still in recovery mode,go recovery>custom recovery>restore to restore the nandroid you downloaded to sdcard.
9.Reboot system.
10.IMPORTANT: hold down POWER+VOL UP button immediately once you reboot the phone then you will enter bootloader mode (black screen + white font written: Bootloader 9.10)
11.Run the RSDlite4.9 in admin mode (right click>run as admin),your phone should be detectable in the RSDlite window.
12.Choose the fixed *.sbf file then click START. Then phone will reboot itself when flashing finished.
Above steps based on my experience,any mistakes do correct me.
I do not hold any responsibility if you ever brick your phone following my steps.