For India the newest update to v4.1.2 is not released yet. And there is no timeline. You can check the latest release status per country on
this page.
On SDS - Sudden Death Syndrome
How to check a vulnerable chip ?
Use this app
EMMC check to
see the EMMC and firmware revision. The faulty one known so far is
eMMC - VTU00M
Revision - 0XF1
PS : This app was originally made for Galaxy S2,
so do not do anything else; only note down your eMMC details
What can be done to be safe ?
Stock ( Official Samsung )
The following ROMs include a Kernel and recovery with the Update 7 "Fixes" applied. If you have one of these, officially (Unrooted), consider yourself "Safe"
- XXELKC
- XXELL1
- XXELL4
- XXELL5
- XXELL6
- XXELLA (Released on Jan 2) Although there is no official confirmation from Samsung on SDS being fixed.
- XXELLC ( Newer version, Although released only for Spain yet)
- Appears like all 4.1.2 based i9300 builds will have the fix.
Custom - Update to a safe Kernel and Recovery combination. So far following kernels and recovery are safe (All available on XDA)
Kernel :
Perseus Alpha31+ (i9300 TW)
Boeffla 2.6 Alpha1 (i9300 TW)
Yank555.lu 3.0a (i9300 TW)
Yank555.lu 1.4 (i9300 AOSP)
Recovery :
PhilZ Touch 4.00-b04 (i9300)
Reference : XDA