S938WVLUACZF1 – Galaxy S25 Ultra firmware

Build S938WVLUACZF1 is a feature update for the Galaxy S25 Ultra (SM-S938W) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 15, 2026 (method) and has reached 11 regions so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to S938WVLU9CZDP is blocked. Samsung still serves this file.

Model
SM-S938W
Android
Android 16
Type
Feature
Bootloader bit
10
First released
Jun 15, 2026
Regions
11

Rollout timeline by region

The date each region code (CSC) first received S938WVLUACZF1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BMCCanada (Bell)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
BWACanadaJun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
ESKCanada (Eastlink)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
FMCCanada (Fido)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
GLWCanada (Freedom)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
KDOCanada (Koodo)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
RWCCanada (Rogers)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
TLSCanada (Telus)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
VMCCanada (Virgin)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
VTRCanada (Videotron)Jun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1
XACCanadaJun 15, 2026day 0S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1

Download and release notes

samloader download -m SM-S938W -r BMC -v S938WVLUACZF1/S938WOYVACZF1/S938WVLUACZF1

Samsung's release notes and security patch level for this update: SM-S938W / BMC on doc.samsungmobile.com. What each part of the build number means: decode S938WVLUACZF1.