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Samsung Galaxy S21 5G (SM-G991U1) Android 15 Firmware (G991U1UESJHZB1) – USA | SamFrew

Home / Firmware / SM-G991U1 / ATC

Galaxy S21 5G

SM-G991U1 Firmware

Latest firmware

PDAG991U1UESJHZB1

ATCAndroid 15Released 2/24/2026

Firmware details

Technical package info

Key identifiers and package metadata for this release.

PDA: G991U1UESJHZB1
CSC: G991U1OYMJHZB1
Country: USA
Changelist: 30959686
Upload date: 3/23/2026
Package size: 7.6 GB (8155547984 bytes)
File name: ATC-G991U1UESJHZB1-20260323145730.zip

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Package size7.6 GB

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ATC CSC Breakdown

Network ID

NW01879

Network Name

Altice USA Wireless, Inc.

Network Country

United States of America

Network Bands

MVNO

Network ID

NW01961

Network Name

ATC TEST

Network Country

Network Bands

any