A very nice share from Xuan69, here’s a video tutorial (English) for updatingthe HDC Galaxy S3 EX/Star B92M to Android 4.1.2 JellyBean. The video will also teach you how to root the device, and apply GPS fix. This is a really great stuff for those who own this phone, enjoy!
For a refresher, the HDC Galaxy S3 EX and the Star B92M are very much similar to each other. Both are really close S3 knock-offs, featuring 4.7 inches screen with 1080×720 pixels in resolution. This JellyBean update adds the support for the following languages: bahasa indo/melayu, deutsch, english, espanol, francais, italiano, netherlands, portugues, brazil/portugal, turkce, puccknn and other asian languages.
All the files you need can be downloaded from this link, its a 400MB archive hosted on torrent.
Some reports say that after they had used this JellyBean firmware update on their phones with 1GB of RAM in configuration, the phone wont recognize that amount of RAM. There is already a support-discussion about this phone unit on XDA-forums. Here’s the tip to get the 1GB of RAM fully working: