Galaxy A16 5G SM-A166U firmware

The latest stable build is A166USQUAEZJ5 (Android 17, feature update), first released on Oct 26, 2026 – 11 days ago. Samsung has published 24 stable builds for this model since Dec 5, 2024: 18 security and 6 feature updates, from Android 14 to Android 17. The current bootloader (binary) version is 10. A device on bit 10 only accepts firmware with bit 10 or higher – see downgrading and the bootloader bit.

Latest build: A166USQUAEZJ5
Released: Oct 26, 2026
Android: Android 17
Bootloader bit: 10
Regions: 9
Stable builds: 24

Latest firmware by region (CSC)

Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.

CSC	Region	Latest build	Android	Released	Builds
`AIO`	USA (Cricket)	`A166USQUAEZJ5`	Android 17	Oct 26, 2026	18
`ATT`	USA (AT&T)	`A166USQUAEZJ5`	Android 17	Oct 26, 2026	18
`CCT`	USA (Comcast)	`A166USQUAEZJ5`	Android 17	Nov 4, 2026	18
`DSA`	USA	`A166USQUAEZJ5`	Android 17	Nov 2, 2026	18
`DSH`	USA	`A166USQUAEZJ5`	Android 17	Nov 2, 2026	18
`TMB`	USA (T-Mobile)	`A166USQUAEZJ5`	Android 17	Oct 27, 2026	18
`TMK`	USA (MetroPCS)	`A166USQUAEZJ5`	Android 17	Oct 27, 2026	18
`USC`	USA (US Cellular)	`A166USQUAEZJ5`	Android 17	Oct 27, 2026	18
`VZW`	USA (Verizon)	`A166USQUAEZJ5`	Android 17	Oct 28, 2026	18

Firmware history (24 builds)

Every stable build (PDA version) Samsung has published for the SM-A166U, newest first. “” is the earliest date the build appeared on Samsung's servers in any region. “” means Samsung no longer serves the file for that build.

Build (PDA)	Released	Android	Type	Bit	Regions	File
`A166USQUAEZJ5`	Oct 26, 2026	Android 17	Feature	10	9	on server
`A166USQSADZI2`	Sep 29, 2026	Android 16	Security	10	9	on server
`A166USQS9DZH1`	Sep 9, 2026	Android 16	Security	9	9	on server
`A166USQS8DZG1`	Jul 28, 2026	Android 16	Security	8	9	on server
`A166USQU7DZEA`	Jun 3, 2026	Android 16	Feature	7	9	on server
`A166USQS7CZDG`	May 13, 2026	Android 16	Security	7	9	on server
`A166USQS6CZB6`	Mar 10, 2026	Android 16	Security	6	9	on server
`A166USQS5CZA8`	Feb 3, 2026	Android 16	Security	5	9	on server
`A166USQS4CYL1`	Dec 21, 2025	Android 16	Security	4	9	on server
`A166USQS3CYJ1`	Oct 29, 2025	Android 16	Security	3	9	on server
`A166USQU3CYIC`	Oct 6, 2025	Android 16	Feature	3	9	on server
`A166USQS3BYF4`	Jul 23, 2025	Android 15	Security	3	9	on server
`A166USQS2BYF3`	Jun 29, 2025	Android 15	Security	2	7	on server
`A166USQU2BYED`	Jun 17, 2025	Android 15	Feature	2	9	on server
`A166USQS2AYEB`	Jun 12, 2025	Android 14	Security	2	2	on server
`A166USQS2AYCA`	Apr 16, 2025	Android 14	Security	2	2	on server
`A166USQS2AYC9`	Apr 15, 2025	Android 14	Security	2	5	on server
`A166USQS1AYC1`	Mar 21, 2025	Android 14	Security	1	2	on server
`A166USQU1AYA6`	Jan 26, 2025	Android 14	Feature	1	2	on server
`A166USQS1AYA2`	Jan 21, 2025	Android 14	Security	1	5	on server
`A166USQS1AYA3`	Jan 20, 2025	Android 14	Security	1	2	on server
`A166USQS1AXL2`	Jan 5, 2025	Android 14	Security	1	4	on server
`A166USQS1AXKA`	Dec 15, 2024	Android 14	Security	1	5	on server
`A166USQU1AXK8`	Dec 5, 2024	Android 14	Feature	1	9	on server

How to download SM-A166U firmware

We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:

samloader download -m SM-A166U -r VZW

Replace VZW with your region code. Step-by-step instructions, including a graphical alternative: How to download Samsung firmware.

Changelog and security patch level

Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-A166U / VZW release notes on doc.samsungmobile.com. Each region page here links to the notes for that code.