Download Samsung Firmware SM-X840
Samsung Galaxy Tab S12+
The latest firmware for Samsung Galaxy Tab S12+ (SM-X840) is X840XXU1AZH3 with Android 17, released on August 10, 2026 for 10 regions (CSC). Every official firmware build for SM-X840, newest first: one row per build with all regions (CSC) that received it.
- Builds
- 2 builds
- Regions (CSC)
- 11 regions
Firmware builds for SM-X840
- CHN
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/X840XXU1AZH3
SM-X840 update history
All 2 builds in our database run Android 17. The newest build, X840XXU1AZH3, was released on August 10, 2026. Updates have become rare: SM-X840 received 2 builds over the last 12 months, in 1 month.
Device specifications
- Display diagonal
- 32 cm (12.6")
- Display resolution
- 2800 x 1752 pixels
- Processor frequency
- 3.5 GHz
- Rear camera resolution
- 13 MP
- Rear camera type
- Single camera
- Front camera resolution
- 12 MP
- Wi-Fi standard
- Wi-Fi 6 (802.11ax)
- Weight
- 553 g
1 retail code (SKU)
Box codes of SM-X840 for different colors and markets. Firmware is chosen by the model code SM-X840 and your region (CSC), not by the SKU.
- SM-X840NZSREUE
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SM-X946B
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Samsung Galaxy Tab S10+, 256 GB, Moonstone Gray
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Frequently Asked Questions
What is the latest Android version for SM-X840?
The newest firmware for SM-X840 runs Android 17: build X840XXU1AZH3, released on August 10, 2026.
When did SM-X840 get its last update?
The latest build for SM-X840, X840XXU1AZH3, was released on August 10, 2026 (2 months ago).
How often does SM-X840 get updates?
Over the last 12 months SM-X840 received 2 builds, with at least one new build in 1 month.
Is the firmware for SM-X840 official?
Yes, all firmware files for SM-X840 are 100% official, original, and obtained directly from Samsung servers.
How to flash Samsung SM-X840 using Odin?
To flash SM-X840, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Can I downgrade the Android version on SM-X840?
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-X840.