Yes, you can enable all application on one of the great features in Samsung Galaxy S III Premium Suite Upgrade ~ Multi Window now. More and more Android 4.1.2 firmware is available for Samsung Galaxy S3 like XXELKC, XXELL4, XXELL5 and XXELLA. All of them support Multi Window but only few applications can be used in that mode. Luckily, you can enable all applications in Samsung Galaxy S3 Multi Window with the same mod from developer who developed for Samsung Galaxy Note 2. As usual, root access and CWM are required.

Use MultiWindow Complete Control Tool to add more applications in Samsung Galaxy S3 Multi Window. Just put the applications that you want and you are ready to go. You need to install framework hack with CWM first. And install MultiWindow Complete Control apk later.
Installation guide – How to install update zip with ClockworkMod Recovery on Samsung Galaxy S3? (Video)
Download MultiWindow Complete Control for Samsung Galaxy S3 here.
hy,do you have a link for framework hack,please
i have the answer,thanks anyway…
Hi Jayce,
Happy New Year!
I follow the link to the framework hack, there are 2 files which are odexed and deodexed.
What do they mean? and which should I choose to install?
Thanks,
Andrie
Happy new year, Andrie.
Odexed = stock firmware. Deodexed for custom ROM.
Thanks a bunch Jayce!
Hi Jayce,
Ive rooted my phone and have not done anything since then. I visited the site for the frame work hack.. im confused on what to download.
XXELK4 Deodex – Odex
XXELKC
XXELL5 Odex & Deodex
XXELLA Deodex
Now i have the international version I9300
Firmware: I9300XXEMA2
Baseband:I9300DXELK1
Version:4.1.2
Thanks a lot. One reason i wanted to root is because of this(additional applications for multiwindow)
Hi W@r10ck, there is no match for your firmware. Can’t use it…
=( one more question. There’s a lot of omega roms version from xda but are all of them compatible for my phone? lastly will it be possible that there will be more versions of framework hack that would be compatible with my baseband?i hope so :[ Thanks a lot.
Yes, if they are cooked for I9300. Maybe if someone create it.
Hi,
I am very disappointed because I upgraded to 412 my GT-I9300 International only for multiwindows and curiously the only applications eligible for are not useful in this mode. So I am looking for a workaround, my ROM is the French SFR stock ELL4 but it is odexed. Is it a solution ?
BR.
Sorry, no as far as I know.
Hi my numan this my mobile number please call my mobile Samsung galaxy S3 Same problem please contact me
Hi Numsn, please contact Samsung Support directly.
03104361231 call me please