F936BXXSCIZH4 – Galaxy Z Fold4 firmware
Build F936BXXSCIZH4 is a security update for the Galaxy Z Fold4 (SM-F936B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 6, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 12, so downgrading to the previous build F936BXXSCIZH3 is still possible. Samsung still serves this file.
- Model
- SM-F936B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 12
- First released
- Sep 6, 2026
- Regions
- 4
Not yet released in 66 regions that are still on an older build: ACR, AFG, AFR, ARO, BOG, BTB, BVO, CAU, CDR, CGU, CHO, COB, COM, COO and 52 more.
Rollout timeline by region
The date each region code (CSC) first received F936BXXSCIZH4, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
OPS | Australia (Optus) | Sep 6, 2026 | day 0 | F936BXXSCIZH4/F936BOXMCIZE2/F936BXXSCIZE2 |
TEL | Australia (Telstra) | Sep 6, 2026 | day 0 | F936BXXSCIZH4/F936BOXMCIZE2/F936BXXSCIZE2 |
VAU | Australia (Vodafone) | Sep 6, 2026 | day 0 | F936BXXSCIZH4/F936BOXMCIZE2/F936BXXSCIZE2 |
XSA | Australia | Sep 6, 2026 | day 0 | F936BXXSCIZH4/F936BOXMCIZE2/F936BXXSCIZE2 |
Download and release notes
samloader download -m SM-F936B -r XSA -v F936BXXSCIZH4/F936BOXMCIZE2/F936BXXSCIZE2Samsung's release notes and security patch level for this update: SM-F936B / XSA on doc.samsungmobile.com. What each part of the build number means: decode F936BXXSCIZH4.