S921BXXSHDZI1 – Galaxy S24 firmware
Build S921BXXSHDZI1 is a security update for the Galaxy S24 (SM-S921B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 27, 2026 (method) and has reached
95 regions so far. It keeps bootloader bit 17, so downgrading to the previous build S921BXXSHDZH3 is still possible. Samsung still serves this file.
- Model
- SM-S921B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 17
- First released
- Sep 27, 2026
- Regions
- 95
Rollout timeline by region
The date each region code (CSC) first received S921BXXSHDZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
GLB | Philippines (Globe) | Sep 27, 2026 | day 0 | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
THL | Thailand | Sep 27, 2026 | day 0 | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XME | Malaysia | Sep 27, 2026 | day 0 | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XNZ | New Zealand | Sep 27, 2026 | day 0 | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XTC | Philippines | Sep 27, 2026 | day 0 | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XXV | Vietnam | Sep 27, 2026 | day 0 | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XID | Indonesia | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOLEHDZI1/S921BXXSHDZI1 |
EUY | Europe (Multi-CSC) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
ACR | Ghana | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
AFG | Afghanistan | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
AFR | Africa | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
BOG | France (Bouygues) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
CAU | Caucasus | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
DKR | Senegal | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
ECT | Nigeria | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
EGY | Egypt | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
EUX | Europe (Multi-CSC) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
EVR | United Kingdom (EE) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
ILO | Israel | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
KSA | Saudi Arabia | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
LYS | Libya | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
MEO | Portugal (MEO) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
MID | Middle East | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
MOB | Austria (A1) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
MOT | Slovenia (Telekom) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
MSR | Serbia | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
MWD | Morocco | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
O2C | Czech Republic (O2) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
OPS | Australia (Optus) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
PAK | Pakistan | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
PKD | Pakistan | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
PLS | Poland (Plus) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
PRT | Poland (Play) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SER | Russia | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SFR | France (SFR) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SIM | Slovenia (A1) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SKZ | Kazakhstan | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SWC | Switzerland | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
TEL | Australia (Telstra) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
TOP | Serbia/Montenegro | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
TUN | Tunisia | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
TUR | Turkey | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
VAU | Australia (Vodafone) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
VIP | Croatia (A1) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XFA | South Africa | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XFE | South Africa | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XFV | South Africa (Vodacom) | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XSA | Australia | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XSG | United Arab Emirates | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
GTO | Guatemala | Sep 29, 2026 | +2 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
INS | India | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
NPB | Nepal | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SLK | Sri Lanka | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
BVO | Bolivia | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CDR | Dominican Republic | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
TPA | Panama | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
ZTA | Brazil (Claro) | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
ZTM | Brazil (TIM) | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
ZTO | Brazil | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
ZVV | Brazil (Vivo) | Sep 30, 2026 | +3 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
MM1 | Singapore (M1) | Oct 4, 2026 | +7 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
SIN | Singapore (Singtel) | Oct 4, 2026 | +7 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
STH | Singapore (StarHub) | Oct 4, 2026 | +7 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
XSP | Singapore | Oct 4, 2026 | +7 days | S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1 |
CGU | Guatemala (Claro) | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
COB | Colombia (Movistar) | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
COL | Colombia | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
COO | Colombia | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CRC | Costa Rica | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
DOR | Dominican Republic | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
GLO | Nigeria (Glo) | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
IUS | Mexico (AT&T) | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
MXO | Mexico | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
PGU | Guatemala | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
TCE | Mexico (Telcel) | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
TMM | Myanmar | Oct 6, 2026 | +9 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
ARO | Argentina | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
COM | Colombia (Claro) | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CTI | Argentina (Claro) | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
PEO | Peru | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
PET | Peru (Movistar) | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
PNT | Panama | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
PSN | Argentina (Personal) | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
SAM | Oceania | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
TGP | Paraguay | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
UFN | Argentina (Movistar) | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
UPO | Uruguay | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
UYO | Uruguay | Oct 7, 2026 | +10 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CHE | Chile (Entel) | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CHL | Chile (Claro) | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CHO | Chile | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CHT | Chile (Movistar) | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
CHX | Chile | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
EBE | Ecuador | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
ECO | Ecuador | Oct 8, 2026 | +11 days | S921BXXSHDZI1/S921BOWOHDZI1/S921BXXSHDZI1 |
Download and release notes
samloader download -m SM-S921B -r EUX -v S921BXXSHDZI1/S921BOXMHDZI1/S921BXXSHDZI1Samsung's release notes and security patch level for this update: SM-S921B / EUX on doc.samsungmobile.com. What each part of the build number means: decode S921BXXSHDZI1.