Samsung lists A566BXXSDCZHB for the Galaxy A56 5G (SM-A566B) as an Android 16 security update released on August 31, 2026, with the August 5, 2026 security patch level. Samsung’s note says only that the device is protected with improved security; it does not enumerate fixes or feature changes. This is not the latest build in the model’s listed history: Samsung also records a later September build.
What A566BXXSDCZHB contains
Samsung’s official Galaxy A56 5G (SM-A566B) update history identifies the build and its listed details:
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| Build | Android version | Samsung release date | Security patch level | Samsung’s summary |
|---|---|---|---|---|
| A566BXXSDCZHB | Android 16 | August 31, 2026 | August 5, 2026 | Security: “The device is protected with improved security.” |
The release-history entry does not specify which individual vulnerabilities were addressed, nor does it describe new features. The patch-level date and Samsung’s release date are separate: one identifies the security patch level; the other is the date shown for the update in Samsung’s history.
Is this the latest SM-A566B firmware?
No. Samsung’s same history page lists A566BXXSECZI2 after this build, with a September 16, 2026 release date and a September 5, 2026 security patch level. It also lists the preceding A566BXXSCCZG7 as a July 27, 2026 release with a July 5, 2026 patch level.
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| Build | Android version | Samsung release date | Security patch level |
|---|---|---|---|
| A566BXXSCCZG7 | Android 16 | July 27, 2026 | July 5, 2026 |
| A566BXXSDCZHB | Android 16 | August 31, 2026 | August 5, 2026 |
| A566BXXSECZI2 | Android 16 | September 16, 2026 | September 5, 2026 |
These are dates and labels shown on Samsung’s English update-history page; rollout timing may differ by region, model, or service provider. A later listed build does not establish that it is available to every SM-A566B handset.
What “MWD” does—and does not—confirm
The update-history entry confirms the build’s presence in the SM-A566B software history, but it does not identify “MWD” or confirm that this build is offered for a device carrying that CSC. Do not treat the letters in the title as proof of a country, carrier, CSC match, or flash compatibility. Confirm the phone’s exact model and service-provider software version, then check for a matching official regional record before relying on region-specific installation information.
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How to check whether your phone has an update
- On the Galaxy A56, open Settings > Software update > Download and install.
- If an update is offered, review the displayed version and patch information before installing. The device’s offer—not the existence of a build in another region’s history—is the relevant indication of availability for that handset.
- If no update appears, check again later or consult Samsung’s update history for the exact model and applicable regional or service-provider software version. Samsung says delivery timing can vary by region and model, and some chipset-vendor patches may be included in later packages; this is not a guarantee of a particular monthly schedule.
Samsung’s update-history notice advises users to “keep your device up to date and regularly check for software updates.”
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Build numbers alone are not enough to establish that two firmware packages are interchangeable or intended for the same handset. When comparing records, check these details together:
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- Exact model number and CSC or service-provider software version
- Full build identifier
- Android version
- Samsung’s listed release date and security patch level
- The changes Samsung actually describes
- Whether the update is offered on your own device
Samsung’s Mobile Security page notes that patch delivery timing can vary by region and model, and that some chipset-vendor patches may arrive in later packages. The official information for A566BXXSDCZHB supports the Android version, dates, and general security summary above, but not a more specific list of fixes.
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