QUOTE(PyOsE @ Oct 29 2009, 12:54 PM)
To those of you that change the product code to update the firware to v2.0, did u guys change back to original product code after the update? or just let it be? 
I did not change my product code back after the update.
But I think tonight I'm gonna try it because I was thinking whether I can use the original product code to revert back to v12 firmware... lol...
I know this sound stupid... but I have some issue with the v20 firmware...
Last night when I've done updating, I check my phone, I did a few restart just to make sure everything is fine...
Then... I got stuck at the famous "White screen of dead"...!!!
Yes, my HelloOX is gone as well~
I never had this "white screen of dead" issue the time I bought the phone,
then updated to v11 firmware, then updated to v12 firmware... never happen... but it happen on the 2nd reboot with v20!
Luckily I did those test... otherwise if it hang at this time, how am I going to work?
Luckily it happened so soon so that I still have a very recent backup to restore...
So, I am now using a freshly formatted v20 device.
My impression with this firmware are:
I like:Although the flick-scrolling is cool, but I would say it is useful for me than "cool".
The QWERTY keyboard's long-press to enter alternate characters is very useful and convenient for me too~
I hate:Web surfing with default browser is laggy... (hey, I already hard reset the phone!)
This morning, my alarm clock rang... I couldn't stop the alarm because the screen is black/blank!!! Can't unlock, can't shutdown, can't do anything... I removed the battery then switch it back to ON... (hey, I already hard reset the phone!)
Well, those are my first day's impression with the v20 firmware...
It's a good news to me if I can't revert back to v12 firmware after I change the product code back to original... will try it tonight~