X520XXSBCZI2 – Galaxy Tab S10 FE firmware

Build X520XXSBCZI2 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 Sep 21, 2026 (method) and has reached 17 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to X520ZCSACZH6 is blocked. Samsung still serves this file.

Model
SM-X520
Android
Android 16
Type
Security
Bootloader bit
11
First released
Sep 21, 2026
Regions
17

Rollout timeline by region

The date each region code (CSC) first received X520XXSBCZI2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
KOOSouth KoreaSep 21, 2026day 0X520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
CAUCaucasusSep 27, 2026+6 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
EUXEurope (Multi-CSC)Sep 27, 2026+6 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
EUYEurope (Multi-CSC)Sep 27, 2026+6 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
TURTurkeySep 27, 2026+6 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
MXOMexicoSep 28, 2026+7 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
ZTOBrazilSep 28, 2026+7 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
XIDIndonesiaSep 28, 2026+7 daysX520XXSBCZI2/X520OLMBCZI2/X520XXSBCZI2
XSPSingaporeSep 28, 2026+7 daysX520XXSBCZI2/X520OLMBCZI2/X520XXSBCZI2
INSIndiaSep 29, 2026+8 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
XACCanadaSep 29, 2026+8 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
XARUSA (Cellular South)Sep 29, 2026+8 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
XJPJapanOct 1, 2026+10 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
ILOIsraelOct 6, 2026+15 daysX520XXSBCZI2/X520OJMBCZI2/X520XXSBCZI2
XSGUnited Arab EmiratesOct 6, 2026+15 daysX520XXSBCZI2/X520OJMBCZI2/X520XXSBCZI2
BRITaiwanOct 15, 2026+24 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2
TGYHong KongOct 15, 2026+24 daysX520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2

Download and release notes

samloader download -m SM-X520 -r EUX -v X520XXSBCZI2/X520OXMBCZI2/X520XXSBCZI2

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 X520XXSBCZI2.