X308UVLSEDZI1 – Galaxy Tab Active5 5G firmware
Build X308UVLSEDZI1 is a security update for the Galaxy Tab Active5 5G (SM-X308U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Oct 15, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 14, so downgrading to the previous build X308UUESFDZI1 is still possible. Samsung still serves this file.
- Model
- SM-X308U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Oct 15, 2026
- Regions
- 4
Not yet released in 4 regions that are still on an older build: ATT, TMB, VZW, XAA.
Rollout timeline by region
The date each region code (CSC) first received X308UVLSEDZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BMC | Canada (Bell) | Oct 15, 2026 | day 0 | X308UVLSEDZI1/X308UOYVEDZI1/X308UVLSEDZI1 |
RWC | Canada (Rogers) | Oct 15, 2026 | day 0 | X308UVLSEDZI1/X308UOYVEDZI1/X308UVLSEDZI1 |
XAC | Canada | Oct 15, 2026 | day 0 | X308UVLSEDZI1/X308UOYVEDZI1/X308UVLSEDZI1 |
FMC | Canada (Fido) | Oct 19, 2026 | +4 days | X308UVLSEDZI1/X308UOYVEDZI1/X308UVLSEDZI1 |
Download and release notes
samloader download -m SM-X308U -r BMC -v X308UVLSEDZI1/X308UOYVEDZI1/X308UVLSEDZI1Samsung's release notes and security patch level for this update: SM-X308U / BMC on doc.samsungmobile.com. What each part of the build number means: decode X308UVLSEDZI1.