For those having issues with the 1gb versions only using 512MB
I found some advice on a german web sight that seams to work.
I used the 4.1.2 files in the torrent linked on youtube and followed this advice
and the "2.5 GB DATA PERMANENT ROOT + FULLY WORKING RECOVERY" from http://forum.xda-developers.com/show...&highlight=1gb
Now i got 4.1.2 and 1gb ram. The GPS is still poo but I'm working on that
A google translate of the german is:
For anyone having issues with having only 512MB after flashing JB, this is what I did: first Copy all the files except boot.img from / 2.5GB-data-perm-root folder into / b92m411/FILE NECCESSARI folder. second Delete preloader_vanzo77_twn_jb.bin inside / b92m411/FILE NECCESSARI folder. third Flash using flashtool untill the green mark appears. 4th Unplug your phone then boot into recovery (volume up + power). 5th Thurs factory reset, then reboot system Voila! Now you have 1GB of RAM. If you want 2.5GB internal memory (not phone memory), flash and preloader.img EBR1 only inside / 2.5GB-data-perm-root folder by Flashtool. Then boot into recovery, go to mount and storage, format / data. Reboot your phone.