X520XXSACZH6 – Galaxy Tab S10 FE firmware

Build X520XXSACZH6 is a security update for the Galaxy Tab S10 FE (SM-X520) on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 30, 2026 (method) and has reached 17 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 X520XXS9CZG3 is blocked. Samsung still serves this file.

Model
SM-X520
Android
Android 16
Type
Security
Bootloader bit
10
First released
Aug 30, 2026
Regions
17

Rollout timeline by region

The date each region code (CSC) first received X520XXSACZH6, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
KOOSouth KoreaAug 30, 2026day 0X520XXSACZH6/X520OXMACZH6/X520XXSACZH6
CAUCaucasusSep 7, 2026+8 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
EUXEurope (Multi-CSC)Sep 7, 2026+8 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
EUYEurope (Multi-CSC)Sep 7, 2026+8 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
ILOIsraelSep 7, 2026+8 daysX520XXSACZH6/X520OJMACZH6/X520XXSACZH6
TURTurkeySep 7, 2026+8 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
XIDIndonesiaSep 7, 2026+8 daysX520XXSACZH6/X520OLMACZH6/X520XXSACZH6
XSGUnited Arab EmiratesSep 7, 2026+8 daysX520XXSACZH6/X520OJMACZH6/X520XXSACZH6
XSPSingaporeSep 7, 2026+8 daysX520XXSACZH6/X520OLMACZH6/X520XXSACZH6
XACCanadaSep 8, 2026+9 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
XARUSA (Cellular South)Sep 8, 2026+9 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
INSIndiaSep 11, 2026+12 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
BRITaiwanSep 14, 2026+15 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
TGYHong KongSep 14, 2026+15 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
XJPJapanSep 14, 2026+15 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
MXOMexicoSep 14, 2026+15 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6
ZTOBrazilSep 14, 2026+15 daysX520XXSACZH6/X520OXMACZH6/X520XXSACZH6

Download and release notes

samloader download -m SM-X520 -r EUX -v X520XXSACZH6/X520OXMACZH6/X520XXSACZH6

Samsung's release notes and security patch level for this update: SM-X520 / EUX on doc.samsungmobile.com. What each part of the build number means: decode X520XXSACZH6.