A156USQSDEZJ4 – Galaxy A15 5G firmware

Build A156USQSDEZJ4 is a security update for the Galaxy A15 5G (SM-A156U) on Android 16 (One UI 8). It first appeared on Samsung's servers on Oct 12, 2026 (method) and has reached 9 regions so far. It raises the bootloader bit from 12 to 13: once installed, the device no longer accepts firmware with bit 12 or lower, so a downgrade to A156USQSCEZG1 is blocked. Samsung still serves this file.

Model
SM-A156U
Android
Android 16
Type
Security
Bootloader bit
13
First released
Oct 12, 2026
Regions
9

Rollout timeline by region

The date each region code (CSC) first received A156USQSDEZJ4, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
AIOUSA (Cricket)Oct 12, 2026day 0A156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
ATTUSA (AT&T)Oct 12, 2026day 0A156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
VZWUSA (Verizon)Oct 14, 2026+2 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
DSAUSAOct 15, 2026+3 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
DSHUSAOct 15, 2026+3 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
TMBUSA (T-Mobile)Oct 15, 2026+3 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
TMKUSA (MetroPCS)Oct 15, 2026+3 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
USCUSA (US Cellular)Oct 15, 2026+3 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4
CCTUSA (Comcast)Oct 19, 2026+7 daysA156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4

Download and release notes

samloader download -m SM-A156U -r AIO -v A156USQSDEZJ4/A156UOYNDEZJ4/A156USQSDEZJ4

Samsung's release notes and security patch level for this update: SM-A156U / AIO on doc.samsungmobile.com. What each part of the build number means: decode A156USQSDEZJ4.