Firmware I9100XXKPA Android 4.0.3 (Ice Cream Sandwich)
Base Firmware: I9100XXKPA (4.0.3)
Build date: January 5 2012
PDA: I9100XXKPA
PHONE: I9100XXKPA
CSC: I9100OXAKPA
ODIN + PIT + Flashguide | DOWNLOAD Link1 or Link2
I9100XXKPA|4.0.3|2012 January|CSC - OXA| DOWNLOAD Link1 or Link2
Root for I9100XXKPA| Download Link1 or Link2
Changes.
Interface: Nothing in case of XXKP8.
Battery: Battery feels better.
Faster: Phones looks faster.
Touch: Touch response is better.
Overall: Firmware more stable but still with some bugs
source: sammobile