My 005SH runs 2.3.4 plus two firmware updates released after the major update. Running 2.3.4 does have its advantages (and a disadvantage as it seems from your info) - improved battery use, slicker UI design, ability to play 3D videos directly from YouTube and so on.
Sharp mobile devices database & tips for Sharp smartphones: http://sharp.cheeseus.org
I mean, Kokos claims they can, but if they could, would he be selling them running 2.2?
The upgrade from 2.2 to 2.3 is not an easy thing to do - you must have your Windows switched to Japanese language/locale and the phone must be switched to Japanese as well. I'm not sure if there are other things that need to be observed.
When I tried to upgrade my 005SH, my Windows was in English and so was my phone. I killed the phone (it got stuck in Update mode) so I had to send it to Japan to get it fixed (luckily, it has warranty and there's a kind soul there who helped me )
That's why I wouldn't risk downgrading...
Hello again guys. No news yet ... but some info that is good to know. If you google "soft unlock 007SH" one of the first results is from a page called foneszone. I've searched if they are legit or scam, and it turns out that they are scam. Here's the experience of some guy who tried to unlock his blackberry: http://tinyurl.com/793k7zz
i found this on a chinese blog. it seems to be the root + unlock for the 007SH