A356U1UES9CZB6 – Galaxy A35 5G firmware

Build A356U1UES9CZB6 is a security update for the Galaxy A35 5G (SM-A356U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Mar 15, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 8 to 9: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to A356U1UES8CZA4 is blocked. Samsung still serves this file.

Model
SM-A356U1
Android
Android 16
Type
Security
Bootloader bit
9
First released
Mar 15, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A356U1UES9CZB6, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
AIOUSA (Cricket)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
ATTUSA (AT&T)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
CCTUSA (Comcast)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
DSAUSAMar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
DSHUSAMar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
LRAUSA (Bluegrass)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
TMBUSA (T-Mobile)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
TMKUSA (MetroPCS)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
USCUSA (US Cellular)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
VZWUSA (Verizon)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
XAAUSA (unlocked)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6
XARUSA (Cellular South)Mar 15, 2026day 0A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6

Download and release notes

samloader download -m SM-A356U1 -r XAA -v A356U1UES9CZB6/A356U1OYM9CZB6/A356U1UES9CZB6

Samsung's release notes and security patch level for this update: SM-A356U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A356U1UES9CZB6.