X520XXS9CZG3 – Galaxy Tab S10 FE firmware

Build X520XXS9CZG3 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 Jul 26, 2026 (method) and has reached 17 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 X520ZCS8CZF2 is blocked. Samsung still serves this file.

Model
SM-X520
Android
Android 16
Type
Security
Bootloader bit
9
First released
Jul 26, 2026
Regions
17

Rollout timeline by region

The date each region code (CSC) first received X520XXS9CZG3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
KOOSouth KoreaJul 26, 2026day 0X520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
CAUCaucasusJul 29, 2026+3 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
EUXEurope (Multi-CSC)Jul 29, 2026+3 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
EUYEurope (Multi-CSC)Jul 29, 2026+3 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
TURTurkeyJul 29, 2026+3 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
XIDIndonesiaJul 29, 2026+3 daysX520XXS9CZG3/X520OLM9CZG3/X520XXS9CZG3
XSPSingaporeJul 29, 2026+3 daysX520XXS9CZG3/X520OLM9CZG3/X520XXS9CZG3
MXOMexicoJul 30, 2026+4 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
ZTOBrazilJul 30, 2026+4 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
INSIndiaJul 30, 2026+4 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
XACCanadaJul 30, 2026+4 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
XARUSA (Cellular South)Jul 30, 2026+4 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
ILOIsraelAug 2, 2026+7 daysX520XXS9CZG3/X520OJM9CZG3/X520XXS9CZG3
XSGUnited Arab EmiratesAug 2, 2026+7 daysX520XXS9CZG3/X520OJM9CZG3/X520XXS9CZG3
XJPJapanAug 6, 2026+11 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
BRITaiwanAug 11, 2026+16 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3
TGYHong KongAug 11, 2026+16 daysX520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3

Download and release notes

samloader download -m SM-X520 -r EUX -v X520XXS9CZG3/X520OXM9CZG3/X520XXS9CZG3

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 X520XXS9CZG3.