Samsung Galaxy S 2 (WiMAX) (ISW11SC) Firmware Overview
The archive lists 3 official builds for the Samsung Galaxy S 2 (WiMAX) across 1 region (CSC). The newest one is ISW11SCKDNE3, released May 21, 2014 with Android Cream.
How to Flash ISW11SC Firmware
Put the Samsung Galaxy S 2 (WiMAX) into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with the same or a higher Bit than the one installed — a lower bootloader binary will be rejected.