A166PXXS7CZB2 – Galaxy A16 5G firmware

Build A166PXXS7CZB2 is a security update for the Galaxy A16 5G (SM-A166P) on Android 16 (One UI 8). It first appeared on Samsung's servers on Mar 4, 2026 (method) and has reached 26 regions so far. It raises the bootloader bit from 6 to 7: once installed, the device no longer accepts firmware with bit 6 or lower, so a downgrade to A166PXXS6CZA1 is blocked. Samsung still serves this file.

Model
SM-A166P
Android
Android 16
Type
Security
Bootloader bit
7
First released
Mar 4, 2026
Regions
26

Rollout timeline by region

The date each region code (CSC) first received A166PXXS7CZB2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
XIDIndonesiaMar 4, 2026day 0A166PXXS7CZB2/A166POLE7CZB2/A166PXXS7CZB1
GLBPhilippines (Globe)Mar 4, 2026day 0A166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
THLThailandMar 4, 2026day 0A166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
XMEMalaysiaMar 4, 2026day 0A166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
XNZNew ZealandMar 4, 2026day 0A166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
XTCPhilippinesMar 4, 2026day 0A166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
XXVVietnamMar 4, 2026day 0A166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
VAUAustralia (Vodafone)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
XSAAustraliaMar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
OPSAustralia (Optus)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
TELAustralia (Telstra)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
ACRGhanaMar 8, 2026+4 daysA166PXXS7CZB2/A166POJM7CZB2/A166PXXS7CZB1
AFRAfricaMar 8, 2026+4 daysA166PXXS7CZB2/A166POJM7CZB2/A166PXXS7CZB1
DKRSenegalMar 8, 2026+4 daysA166PXXS7CZB2/A166POJM7CZB2/A166PXXS7CZB1
ECTNigeriaMar 8, 2026+4 daysA166PXXS7CZB2/A166POJM7CZB2/A166PXXS7CZB1
MM1Singapore (M1)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
SINSingapore (Singtel)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
STHSingapore (StarHub)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
XFASouth AfricaMar 8, 2026+4 daysA166PXXS7CZB2/A166POJM7CZB2/A166PXXS7CZB1
XFVSouth Africa (Vodacom)Mar 8, 2026+4 daysA166PXXS7CZB2/A166POJM7CZB2/A166PXXS7CZB1
XSPSingaporeMar 8, 2026+4 daysA166PXXS7CZB2/A166POLM7CZB2/A166PXXS7CZB1
BKDBangladeshMar 10, 2026+6 daysA166PXXS7CZB2/A166PODM7CZB2/A166PXXS7CZB1
BNGBelgiumMar 10, 2026+6 daysA166PXXS7CZB2/A166PODM7CZB2/A166PXXS7CZB1
INSIndiaMar 10, 2026+6 daysA166PXXS7CZB2/A166PODM7CZB2/A166PXXS7CZB1
NPBNepalMar 10, 2026+6 daysA166PXXS7CZB2/A166PODM7CZB2/A166PXXS7CZB1
SLKSri LankaMar 10, 2026+6 daysA166PXXS7CZB2/A166PODM7CZB2/A166PXXS7CZB1

Download and release notes

samloader download -m SM-A166P -r INS -v A166PXXS7CZB2/A166PODM7CZB2/A166PXXS7CZB1

Samsung's release notes and security patch level for this update: SM-A166P / INS on doc.samsungmobile.com. What each part of the build number means: decode A166PXXS7CZB2.