S921USQU6EZIF – Galaxy S24 firmware

Build S921USQU6EZIF is a feature update for the Galaxy S24 (SM-S921U) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 11, 2026 (method) and has reached 10 regions so far. It keeps bootloader bit 6, so downgrading to the previous build S921USQS6DZI1 is still possible. Samsung still serves this file.

Model
SM-S921U
Android
Android 17
Type
Feature
Bootloader bit
6
First released
Oct 11, 2026
Regions
10

Rollout timeline by region

The date each region code (CSC) first received S921USQU6EZIF, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ATTUSA (AT&T)Oct 11, 2026day 0S921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
AIOUSA (Cricket)Oct 11, 2026day 0S921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
TMBUSA (T-Mobile)Oct 11, 2026day 0S921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
TMKUSA (MetroPCS)Oct 11, 2026day 0S921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
USCUSA (US Cellular)Oct 11, 2026day 0S921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
DSAUSAOct 15, 2026+4 daysS921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
DSHUSAOct 15, 2026+4 daysS921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
CCTUSA (Comcast)Oct 18, 2026+7 daysS921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
VZWUSA (Verizon)Oct 21, 2026+10 daysS921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF
XAAUSA (unlocked)Oct 21, 2026+10 daysS921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF

Download and release notes

samloader download -m SM-S921U -r XAA -v S921USQU6EZIF/S921UOYN6EZIF/S921USQU6EZIF

Samsung's release notes and security patch level for this update: SM-S921U / XAA on doc.samsungmobile.com. What each part of the build number means: decode S921USQU6EZIF.