Galaxy A26 5G

Download Samsung Firmware SM-A266U

Samsung Galaxy A26 5G

The latest firmware for Samsung Galaxy A26 5G (SM-A266U) is A266USQSACZH3 with Android 16, released on September 9, 2026 for 2 regions (CSC). Every official firmware build for SM-A266U, newest first: one row per build with all regions (CSC) that received it.

Latest build
A266USQSACZH3 Android 16 · 1 month ago
Builds
10 builds
Regions (CSC)
2 regions

Firmware builds for SM-A266U

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/A266USQSACZH3

SM-A266U update history

SM-A266U started on Android 15 and has received 1 major Android upgrade; it now runs Android 16. The newest build, A266USQSACZH3, was released on September 9, 2026 with the August 2026 security patch. Over the last 12 months SM-A266U received 7 builds, spread over 7 different months. Samsung guarantees security updates for this model until March 24, 2031.

Device specifications

Launched with
Android 15
Display diagonal
17 cm (6.7")
Display resolution
1080 x 2340 pixels
RAM
6 GB
Rear camera resolution
50 MP
Rear camera type
Triple camera
Battery capacity
5000 mAh
Weight
200 g

Specifications of SM-A266B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

Changelog for SM-A266U

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

One UI 8.5
Visual design

Fresh new look
One UI seamlessly integrates into your daily routine by combining immersive visuals with meaningful personalization for a more refined and sophisticated design. Transparent blur effects add depth and make content easier to navigate, while floating elements react organically to your workflow for a more focused experience. Through familiar and intuitive data visualization, One UI delivers a design that feels both personal and relatable, helping you focus...

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

Show 7 older builds

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

One UI 8.0 (Android 16)
Productivity

Check stock prices without unlocking
Stocks you follow on Google Finance with big price changes will appear on your Now bar at the end of the trading day.

Easier file sharing with Quick Share
It's never been easier to send and receive files. Tap the Quick Share button in quick settings to get started. You can receive files while the Quick Share screen is open and send files to others directly from Quick Share.

Sticky notes
Add quick annotations on top o...

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Press and hold the Side button to access Google Gemini
The Side button is a new way to access Google Gemini or other digital assistant app quickly instead of using the corner swipe. You can change what the Side button does in Settings.
• Complete multiple tasks with one ask
Google Gemini is now seamlessly integrated with Samsung apps such as Calendar, Notes, Reminder, and Clock. You can complete tasks in these apps using information from Gemini with one simple command. Try asking Google Gemini...

• Security
The device is protected with improved security.

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-A266U?

The newest firmware for SM-A266U runs Android 16: build A266USQSACZH3, released on September 9, 2026.

When did SM-A266U get its last update?

The latest build for SM-A266U, A266USQSACZH3, was released on September 9, 2026 (1 month ago).

How often does SM-A266U get updates?

Over the last 12 months SM-A266U received 7 builds, with at least one new build in 7 different months.

Is the firmware for SM-A266U official?

Yes, all firmware files for SM-A266U are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-A266U using Odin?

To flash SM-A266U, 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-A266U?

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-A266U.