Samsung SM-G998U — Firmware G998USQSHHYI1
Device: Samsung Samsung Galaxy S21 Ultra 5G
Model Code: SM-G998U
Series: Galaxy G
Build Number: G998USQSHHYI1
Region (CSC): VZW
Android Version: v15
Release Date: 2025-09-30 00:00
User Rating:
Downloads: 737
Important: This is an official Samsung Service ROM (4-file format). Use Odin to flash. Includes PIT partition. For repair/update purposes only.
Step-by-Step Flashing Instructions
- Preparation: Download this firmware file.
- Odin: Download Odin3 v3.14.4 or newer.
- Download Mode: Power off your Samsung Galaxy S21 Ultra 5G. Hold Vol Up + Vol Down and connect USB.
- Load Files: Open the downloaded firmware. Select BL, AP, CP, CSC files in Odin.
- Flash: Click Start. Wait for "PASS!" message.