Samsung Galaxy A16 5G (SM-A166B) Firmware

Samsung Galaxy A16 5G (SM-A166B) Firmware Overview

What is the latest SM-A166B firmware?

A166BXXUAEZJ5, released October 8, 2026 with Android 17. It is a feature update on bootloader binary 10. The archive holds 35 official builds across 15 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.

Is the Samsung Galaxy A16 5G still getting updates?

Yes. The newest build is from October 2026, and 15 of 15 regions already have a build from that month; the rest usually follow within a few weeks.

Which Android versions did it get?

The SM-A166B builds in the archive run Android 16 to 17. The earliest build we have for each version:

• Android 17: A166BXXUAEZJ5 (Oct 2026), 15 builds in total
• Android 16: A166BXXS9DZG1 (Jul 2026), 20 builds in total

Can I downgrade the SM-A166B firmware?

Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 9 to 10:

• Binary 10 — since Aug 2026
• Binary 9 — since Jul 2026

A phone already on binary 10 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 10 build. How to read a build number.