T636BXXS9DYH2 – Galaxy Tab Active4 Pro firmware
Build T636BXXS9DYH2 is a security update for the Galaxy Tab Active4 Pro (SM-T636B)
on Android 15 (One UI 7). It first appeared on Samsung's servers on Aug 28, 2025 (method) and has reached
21 regions so far. It raises the bootloader bit from 8 to 9: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to T636BXXU8DYE8 is blocked. Samsung still serves this file.
- Model
- SM-T636B
- Android
- Android 15
- Type
- Security
- Bootloader bit
- 9
- First released
- Aug 28, 2025
- Regions
- 21
Rollout timeline by region
The date each region code (CSC) first received T636BXXS9DYH2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
CAU | Caucasus | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOXM9DYH2/T636BXXS9DYH2 |
EUX | Europe (Multi-CSC) | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOXM9DYH2/T636BXXS9DYH2 |
EUY | Europe (Multi-CSC) | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOXM9DYH2/T636BXXS9DYH2 |
SKZ | Kazakhstan | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOXM9DYH2/T636BXXS9DYH2 |
THL | Thailand | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOLM9DYH2/T636BXXS9DYH2 |
XME | Malaysia | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOLM9DYH2/T636BXXS9DYH2 |
XSA | Australia | Aug 28, 2025 | day 0 | T636BXXS9DYH2/T636BOLM9DYH2/T636BXXS9DYH2 |
CHO | Chile | Sep 2, 2025 | +5 days | T636BXXS9DYH2/T636BOWO9DYH2/T636BXXS9DYH2 |
COO | Colombia | Sep 2, 2025 | +5 days | T636BXXS9DYH2/T636BOWO9DYH2/T636BXXS9DYH2 |
GTO | Guatemala | Sep 2, 2025 | +5 days | T636BXXS9DYH2/T636BOWO9DYH2/T636BXXS9DYH2 |
MXO | Mexico | Sep 2, 2025 | +5 days | T636BXXS9DYH2/T636BOWO9DYH2/T636BXXS9DYH2 |
PEO | Peru | Sep 2, 2025 | +5 days | T636BXXS9DYH2/T636BOWO9DYH2/T636BXXS9DYH2 |
TEL | Australia (Telstra) | Sep 3, 2025 | +6 days | T636BXXS9DYH2/T636BOLM9DYH2/T636BXXS9DYH2 |
XSP | Singapore | Sep 3, 2025 | +6 days | T636BXXS9DYH2/T636BOLM9DYH2/T636BXXS9DYH2 |
XNZ | New Zealand | Sep 8, 2025 | +11 days | T636BXXS9DYH2/T636BOLM9DYH2/T636BXXS9DYH2 |
EGY | Egypt | Sep 29, 2025 | +32 days | T636BXXS9DYH2/T636BOJM9DYH2/T636BXXS9DYH2 |
ILO | Israel | Sep 29, 2025 | +32 days | T636BXXS9DYH2/T636BOJM9DYH2/T636BXXS9DYH2 |
KSA | Saudi Arabia | Sep 29, 2025 | +32 days | T636BXXS9DYH2/T636BOJM9DYH2/T636BXXS9DYH2 |
MID | Middle East | Sep 29, 2025 | +32 days | T636BXXS9DYH2/T636BOJM9DYH2/T636BXXS9DYH2 |
MWD | Morocco | Sep 29, 2025 | +32 days | T636BXXS9DYH2/T636BOJM9DYH2/T636BXXS9DYH2 |
XSG | United Arab Emirates | Sep 29, 2025 | +32 days | T636BXXS9DYH2/T636BOJM9DYH2/T636BXXS9DYH2 |
Download and release notes
samloader download -m SM-T636B -r EUX -v T636BXXS9DYH2/T636BOXM9DYH2/T636BXXS9DYH2Samsung's release notes and security patch level for this update: SM-T636B / EUX on doc.samsungmobile.com. What each part of the build number means: decode T636BXXS9DYH2.