Samsung Galaxy W (GT-I8150B) Firmware Overview
The archive lists 2 official builds for the Samsung Galaxy W across 1 region (CSC). The newest one is I8150BVJLB1, released February 20, 2012 with Android 2.3.6.
How to Flash GT-I8150B Firmware
Put the Samsung Galaxy W 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.