M366BXXS6BZD5 – Galaxy M36 5G firmware
Build M366BXXS6BZD5 is a security update for the Galaxy M36 5G (SM-M366B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on May 6, 2026 (method) and has reached
2 regions so far. It raises the bootloader bit from 5 to 6: once installed, the device no longer accepts firmware with bit 5 or lower, so a downgrade to M366BXXS5BZB3 is blocked. Samsung still serves this file.
- Model
- SM-M366B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 6
- First released
- May 6, 2026
- Regions
- 2
Rollout timeline by region
The date each region code (CSC) first received M366BXXS6BZD5, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
INS | India | May 6, 2026 | day 0 | M366BXXS6BZD5/M366BODM6BZD5/M366BXXS6BZD5 |
NPB | Nepal | May 6, 2026 | day 0 | M366BXXS6BZD5/M366BODM6BZD5/M366BXXS6BZD5 |
Download and release notes
samloader download -m SM-M366B -r INS -v M366BXXS6BZD5/M366BODM6BZD5/M366BXXS6BZD5Samsung's release notes and security patch level for this update: SM-M366B / INS on doc.samsungmobile.com. What each part of the build number means: decode M366BXXS6BZD5.