T636BXXSBDZE2 – Galaxy Tab Active4 Pro firmware
Build T636BXXSBDZE2 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 Jun 1, 2026 (method) and has reached
21 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to T636BXXSADZB4 is blocked. Samsung still serves this file.
- Model
- SM-T636B
- Android
- Android 15
- Type
- Security
- Bootloader bit
- 11
- First released
- Jun 1, 2026
- Regions
- 21
Rollout timeline by region
The date each region code (CSC) first received T636BXXSBDZE2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
CAU | Caucasus | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOXMBDZE2/T636BXXSBDZE2 |
EUX | Europe (Multi-CSC) | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOXMBDZE2/T636BXXSBDZE2 |
EUY | Europe (Multi-CSC) | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOXMBDZE2/T636BXXSBDZE2 |
SKZ | Kazakhstan | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOXMBDZE2/T636BXXSBDZE2 |
EGY | Egypt | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOJMBDZE2/T636BXXSBDZE2 |
ILO | Israel | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOJMBDZE2/T636BXXSBDZE2 |
KSA | Saudi Arabia | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOJMBDZE2/T636BXXSBDZE2 |
MID | Middle East | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOJMBDZE2/T636BXXSBDZE2 |
MWD | Morocco | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOJMBDZE2/T636BXXSBDZE2 |
XSG | United Arab Emirates | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOJMBDZE2/T636BXXSBDZE2 |
CHO | Chile | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOWOBDZE2/T636BXXSBDZE2 |
COO | Colombia | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOWOBDZE2/T636BXXSBDZE2 |
GTO | Guatemala | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOWOBDZE2/T636BXXSBDZE2 |
MXO | Mexico | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOWOBDZE2/T636BXXSBDZE2 |
PEO | Peru | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOWOBDZE2/T636BXXSBDZE2 |
TEL | Australia (Telstra) | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOLMBDZE2/T636BXXSBDZE2 |
THL | Thailand | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOLMBDZE2/T636BXXSBDZE2 |
XME | Malaysia | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOLMBDZE2/T636BXXSBDZE2 |
XNZ | New Zealand | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOLMBDZE2/T636BXXSBDZE2 |
XSA | Australia | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOLMBDZE2/T636BXXSBDZE2 |
XSP | Singapore | Jun 1, 2026 | day 0 | T636BXXSBDZE2/T636BOLMBDZE2/T636BXXSBDZE2 |
Download and release notes
samloader download -m SM-T636B -r EUX -v T636BXXSBDZE2/T636BOXMBDZE2/T636BXXSBDZE2Samsung'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 T636BXXSBDZE2.