ok, so you have the GT-i9100G, from Malaysia.
I am 98% sure you need this firmware:
http://www.sammobile.com/firmwares/download/15074/I9100GDXLS8_I9100GOLBLS8_XME/
It seems to be the latest.. 4.1.2
Who is your carrier?
Let me double check that, unless someone can confirm.
Oh, and by the way, since we know your model number and country, you need to remove that pic as it is displaying your IMEI number. Some folks will do nefarious things with that if they find it. If you don't know/or can't remove your pic, let me know and I can help.
I am 98% sure you need this firmware:
http://www.sammobile.com/firmwares/download/15074/I9100GDXLS8_I9100GOLBLS8_XME/
It seems to be the latest.. 4.1.2
Who is your carrier?
Let me double check that, unless someone can confirm.
Oh, and by the way, since we know your model number and country, you need to remove that pic as it is displaying your IMEI number. Some folks will do nefarious things with that if they find it. If you don't know/or can't remove your pic, let me know and I can help.