Samsung Galaxy S 2 (GT-I9100P) Firmware Overview
What is the latest GT-I9100P firmware?
I9100PXXLSQ, released May 1, 2013 for region TIM with Android 4.1–4.3. The archive holds 3 official builds for this region.
Is the Samsung Galaxy S 2 still getting updates?
Most likely not: there has been no new firmware since May 2013, so Android 4.1–4.3 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
GT-I9100P firmware for region TIM
How to Flash GT-I9100P Firmware
Put the Samsung Galaxy S 2 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Use HOME_CSC to keep your data, CSC for a full wipe.