Samsung Galaxy Mega 6.3 LTE (SCH-R960) Firmware Overview
The archive lists 3 official builds for the Samsung Galaxy Mega 6.3 LTE across 1 region (CSC). The newest one is R960TYUBPE4, released June 14, 2016 with Android 4.4.2.
How to Flash SCH-R960 Firmware
Put the Samsung Galaxy Mega 6.3 LTE 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.