SM-T866N 1 country Android 11

Samsung Galaxy Tab S6 5G T866NKOU4CUI5 Firmware

Name: Samsung Galaxy Tab S6 5G (SM-T866N)
Brand: Samsung
Availability: InStock

Samsung Galaxy Tab S6 5G T866NKOU4CUI5 is an Android 11 firmware for South Korea (KOO). 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 T866NKOS3CUG1 https://samfirm.shop/build/T866NKOS3CUG1: bootloader binary raised from 3 to 4, so after installing it there is no way back to older builds. A newer build for SM-T866N is available: T866NKOU5DXJ1 https://samfirm.shop/build/T866NKOU5DXJ1.

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Android 11

OS Version

2021-10-07

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 Tab S6 5G use bootloader binary 5 (latest: T866NKOU5DXJ1). If your device already runs binary 5, 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: T866NKOU4CUI5

Model	Region	CSC Version	Release date	Size	File name	Download
SM-T866N	KOO South Korea	T866NKOO4CUI5	2021-10-07	4.818 GiB	SM-T866N_1_20210929084752_m4pxx9v24w_fac.zip

How to flash T866NKOU4CUI5

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

T866NKOU4CUI5 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

T866NKOU4CUI5 is Android 11 firmware for Samsung Galaxy Tab S6 5G, released for South Korea (KOO). Samsung built it on 2021-10-07.

No. A newer build for SM-T866N is available: T866NKOU5DXJ1. Install it instead of T866NKOU4CUI5 unless you need this exact version. The previous build was T866NKOS3CUG1.

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 4.818 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Tab S6 5G must be on bootloader binary 4 or lower.

This build uses bootloader binary 4. It can be flashed on a Samsung Galaxy Tab S6 5G running binary 4 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 7 other builds of this model use the same binary, so you can switch between them in both directions.