Galaxy M36 5G SM-M366B updates & firmware

This page tracks every software update Samsung's update servers list for the Samsung Galaxy M36 5G (SM-M366B). The latest stable build is M366BXXU8CZJ5 (Android 17, feature update), first released on Oct 28, 2026. Samsung has published 12 stable builds for this model since Jun 4, 2025: 7 security and 5 feature updates, from Android 15 to Android 17. The current bootloader (binary) version is 8. A device on bit 8 only accepts firmware with bit 8 or higher – see downgrading and the bootloader bit.

Rollout: build M366BXXU8CZJ5 (Android 17 (One UI 9)) is live in all 2 regions, first released on Oct 28, 2026 in INS (India). In India (INS) the latest official firmware (flash file) is M366BXXU8CZJ5 from Oct 28, 2026.

Latest build: M366BXXU8CZJ5
Released: Oct 28, 2026
Android: Android 17
Bootloader bit: 8
Regions: 2
Stable builds: 12

Update policy

Samsung promised 6 major Android upgrades and 6 years of security updates for the Galaxy M36 5G, counted from its launch in June 2025 with Android 15. That makes Android 21 the last major version and security updates continue until about June 2031. It is currently on Android 17 (One UI 9), so 4 major upgrades are still to come.

OS upgrades promised: 6
Security updates: 6 years
Last major version: Android 21
Security support until: June 2031
Current version: Android 17 (One UI 9)
Status: Supported

Source: Samsung. Samsung counts from the global launch and does not publish exact end dates; the dates above are launch month plus the promised years.

Compare all models: Samsung update policy by model.

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
`INS`	India	`M366BXXU8CZJ5`	Android 17	Oct 28, 2026	12
`NPB`	Nepal	`M366BXXU8CZJ5`	Android 17	Oct 28, 2026	12

Firmware history (12 builds)

Every stable build (PDA version) Samsung has published for the SM-M366B, newest first. “Released” is the earliest date the build appeared on Samsung's servers in any region (how dates work). “pulled” means Samsung no longer serves the file for that build, usually because newer builds replaced it (details).

Build (PDA)	Released	Android	Type	Bit	Regions	File
`M366BXXU8CZJ5`	Oct 28, 2026	Android 17	Feature	8	2	on server
`M366BXXS8BZH3`	Sep 8, 2026	Android 16	Security	8	2	on server
`M366BXXS7BZG6`	Aug 13, 2026	Android 16	Security	7	2	on server
`M366BXXU6BZE3`	Jun 3, 2026	Android 16	Feature	6	2	on server
`M366BXXS6BZD5`	May 6, 2026	Android 16	Security	6	2	on server
`M366BXXS5BZB3`	Mar 17, 2026	Android 16	Security	5	2	on server
`M366BXXS4BZA3`	Feb 8, 2026	Android 16	Security	4	2	on server
`M366BXXS3BYK1`	Nov 26, 2025	Android 16	Security	3	2	on server
`M366BXXU2BYI3`	Oct 6, 2025	Android 16	Feature	2	2	on server
`M366BXXS2AYH1`	Aug 10, 2025	Android 15	Security	2	2	on server
`M366BXXU1AYF1`	Jun 4, 2025	Android 15	Feature	1	2	on server
`M366BXXU1AYE5`	Jun 4, 2025	Android 15	Feature	1	2	on server

How to download SM-M366B 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-M366B -r INS

Replace INS 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-M366B / INS release notes on doc.samsungmobile.com. Each region page here links to the notes for that code. We don't show the patch level ourselves because Samsung's update servers don't report it (why).