X820XXS9DZG1 – Galaxy Tab S10+ firmware

Build X820XXS9DZG1 is a security update for the Galaxy Tab S10+ (SM-X820) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 26, 2026 (method) and has reached 18 regions so far. It raises the bootloader bit from 8 to 9: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to X820ZCS8DZF2 is blocked. Samsung still serves this file.

Model
SM-X820
Android
Android 16
Type
Security
Bootloader bit
9
First released
Jul 26, 2026
Regions
18

Rollout timeline by region

The date each region code (CSC) first received X820XXS9DZG1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
KOOSouth KoreaJul 26, 2026day 0X820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
BNGBelgiumAug 2, 2026+7 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
INSIndiaAug 2, 2026+7 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
XACCanadaAug 2, 2026+7 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
XARUSA (Cellular South)Aug 2, 2026+7 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
EUXEurope (Multi-CSC)Aug 2, 2026+7 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
EUYEurope (Multi-CSC)Aug 2, 2026+7 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
CAUCaucasusAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
ILOIsraelAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
TURTurkeyAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
XIDIndonesiaAug 4, 2026+9 daysX820XXS9DZG1/X820OLE9DZG1/X820XXS9DZG1
XSGUnited Arab EmiratesAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
XSPSingaporeAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
MXOMexicoAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
ZTOBrazilAug 4, 2026+9 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
XJPJapanAug 6, 2026+11 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
BRITaiwanAug 12, 2026+17 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1
TGYHong KongAug 12, 2026+17 daysX820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1

Download and release notes

samloader download -m SM-X820 -r EUX -v X820XXS9DZG1/X820OXM9DZG1/X820XXS9DZG1

Samsung's release notes and security patch level for this update: SM-X820 / EUX on doc.samsungmobile.com. What each part of the build number means: decode X820XXS9DZG1.