SM-M166S 1 country Android 16

Samsung Galaxy M16 5G M166SKSS4BYL1 Firmware

Name: Samsung Galaxy M16 5G (SM-M166S)
Brand: Samsung
Availability: InStock

Samsung Galaxy M16 5G M166SKSS4BYL1 is an Android 16 firmware for South Korea (SKC). It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build M166SKSS4BYK2 https://samfirm.shop/build/M166SKSS4BYK2, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-M166S is available: M166SKSS8CZH9 https://samfirm.shop/build/M166SKSS8CZH9.

8.8/10 (32)270 times

Android 16

OS Version

2025-12-09

Build Date

n/a

Security patch

Countries

CSC codes

Bootloader binary

Bootloader binary 4. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy M16 5G use bootloader binary 8 (latest: M166SKSS8CZH9). If your device already runs binary 8, this build cannot be flashed.

All regional downloads

Pick your region (CSC) to download the matching firmware package.

Will it work on my device?

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.

MODEM/CP Version: M166SKSS4BYL1

Model	Region	CSC Version	Release date	Size	File name	Download
SM-M166S	SKC South Korea	M166SSKC4BYL1	2025-12-18	6.893 GiB	SM-M166S_2_20251209125640_7wxp07tlac_fac.zip

How to flash M166SKSS4BYL1

Install Samsung USB Drivers:Download Official Drivers
Download Odin Flash Tool:

M166SKSS4BYL1 has bootloader binary 4. Your device must run binary 4 or lower: it is the 5th character from the end of your current build number.
CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
The Download Mode key combo depends on the model: see all combos.

Full flashing guide

Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.

Frequently Asked Questions

M166SKSS4BYL1 is Android 16 firmware for Samsung Galaxy M16 5G, released for South Korea (SKC). Samsung built it on 2025-12-09.

No. A newer build for SM-M166S is available: M166SKSS8CZH9. Install it instead of M166SKSS4BYL1 unless you need this exact version. The previous build was M166SKSS4BYK2.

Download the package for your region (CSC) and unzip it. In Odin, load each file into the slot with the same name: BL, AP, CP (if the package has one) and CSC, or HOME_CSC to keep your data. Odin checks the built-in checksum of every .tar.md5 file before flashing. The download is 6.893 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy M16 5G must be on bootloader binary 4 or lower.

This build uses bootloader binary 4. It can be flashed on a Samsung Galaxy M16 5G running binary 4 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 1 other build of this model uses the same binary, so you can switch between them in both directions.