ROM SM-G900H Việt Nam

Model: SM-G900H

Model name: GALAXY S5

Country: Vietnam

Version: Android 4.4.2

Changelist: 1186981

Build date: Mon, 31 Mar 2014 09:35:10 +0000

Product Code: XXV

PDA: G900HXXU1ANCJ

CSC: G900HOLB1ANCH

MODEM: G900HXXU1ANCI

link here
Instructions
Extract (unzip) the firmware file
Download Odin v3.09
Extract Odin zip-file
Open Odin v3.09
Reboot phone in Download Mode (press and hold Home + Power + Volume Down buttons)
Connect phone and wait until you get a blue sign in Odin
Add the firmware file to AP / PDA
Make sure re-partition is NOT ticked
Click the start button, sit back and wait a few minutes