A166MUBSADZH1 – Galaxy A16 5G firmware
Build A166MUBSADZH1 is a security update for the Galaxy A16 5G (SM-A166M)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 8, 2026 (method) and has reached
34 regions so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to A166MUBS9DZGA is blocked. Samsung still serves this file.
- Model
- SM-A166M
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 10
- First released
- Sep 8, 2026
- Regions
- 34
Rollout timeline by region
The date each region code (CSC) first received A166MUBSADZH1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ARO | Argentina | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CDR | Dominican Republic | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CGU | Guatemala (Claro) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
COM | Colombia (Claro) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CTI | Argentina (Claro) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
GTO | Guatemala | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
PGU | Guatemala | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
PSN | Argentina (Personal) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
TPA | Panama | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
UFN | Argentina (Movistar) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
UYO | Uruguay | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
ZTA | Brazil (Claro) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
ZTM | Brazil (TIM) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
ZTO | Brazil | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
ZVV | Brazil (Vivo) | Sep 8, 2026 | day 0 | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
IUS | Mexico (AT&T) | Sep 9, 2026 | +1 day | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
MXO | Mexico | Sep 9, 2026 | +1 day | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
TCE | Mexico (Telcel) | Sep 9, 2026 | +1 day | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
TMM | Myanmar | Sep 9, 2026 | +1 day | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CHE | Chile (Entel) | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CHL | Chile (Claro) | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CHO | Chile | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CHT | Chile (Movistar) | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CHX | Chile | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
COB | Colombia (Movistar) | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
COL | Colombia | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
COO | Colombia | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
CRC | Costa Rica | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
DOR | Dominican Republic | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
GLO | Nigeria (Glo) | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
PEO | Peru | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
PET | Peru (Movistar) | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
PNT | Panama | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
SAM | Oceania | Sep 14, 2026 | +6 days | A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1 |
Download and release notes
samloader download -m SM-A166M -r ARO -v A166MUBSADZH1/A166MOWOADZH1/A166MUBSADZH1Samsung's release notes and security patch level for this update: SM-A166M / ARO on doc.samsungmobile.com. What each part of the build number means: decode A166MUBSADZH1.