A356USQSBDZG4 – Galaxy A35 5G firmware
Build A356USQSBDZG4 is a security update for the Galaxy A35 5G (SM-A356U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 21, 2026 (method) and has reached
5 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to A356USQUADZE9 is blocked. Samsung still serves this file.
- Model
- SM-A356U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 11
- First released
- Jul 21, 2026
- Regions
- 5
Rollout timeline by region
The date each region code (CSC) first received A356USQSBDZG4, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ATT | USA (AT&T) | Jul 21, 2026 | day 0 | A356USQSBDZG4/A356UOYNBDZG4/A356USQSBDZG4 |
CCT | USA (Comcast) | Jul 22, 2026 | +1 day | A356USQSBDZG4/A356UOYNBDZG4/A356USQSBDZG4 |
DSA | USA | Jul 23, 2026 | +2 days | A356USQSBDZG4/A356UOYNBDZG4/A356USQSBDZG4 |
DSH | USA | Jul 23, 2026 | +2 days | A356USQSBDZG4/A356UOYNBDZG4/A356USQSBDZG4 |
USC | USA (US Cellular) | Jul 30, 2026 | +9 days | A356USQSBDZG4/A356UOYNBDZG4/A356USQSBDZG4 |
Download and release notes
samloader download -m SM-A356U -r ATT -v A356USQSBDZG4/A356UOYNBDZG4/A356USQSBDZG4Samsung's release notes and security patch level for this update: SM-A356U / ATT on doc.samsungmobile.com. What each part of the build number means: decode A356USQSBDZG4.