One UI 9 is reaching global Galaxy A56 and A36 units. The A56 build has the October 2026 patch, while the A36 build stops at September.

Key takeaways

The global builds are A566BXXUEDZJ1 for the Galaxy A56 and A366BXXUCDZIF for the Galaxy A36. Both started appearing on October 19, 2026.
The A56 build includes the October 2026 security patch. The A36 global build ships with the September 2026 patch.
Neither phone gets the new Galaxy AI features. SamMobile reports Samsung is keeping those for Galaxy S, Z and Tab S devices.

Samsung's stable One UI 9 update, based on Android 17, is now rolling out to Galaxy A56 and Galaxy A36 phones outside South Korea. Global builds started appearing on October 19, 2026, four days after the Korean release on October 15.

The two phones are not getting identical packages. SammyGuru and TechRepublic both report the October 5, 2026 security patch on the A56 build. SamMobile and Android Central list the September 2026 patch on the A36 global build.

Where One UI 9 has landed, by model and build

This table combines firmware reports from several outlets. The source column shows how solid each row is.

Phone	Model / variant	Market	Build	Security patch	Reported size	First seen	Evidence
Galaxy A56	SM-A566S	South Korea	A566SKSUADZJ1	Not reported	Not reported	October 15, 2026	SamMobile, SammyGuru
Galaxy A36	SM-A366N	South Korea	A366NKSU9DZIF	Not confirmed	2,485.01MB	October 15, 2026	SamMobile, Android Central
Galaxy A56	SM-A566B	Middle East, Indonesia	A566BXXUEDZJ1	October 5, 2026	2,314.37MB	October 19, 2026	SamMobile, SammyGuru, TechRepublic
Galaxy A36	SM-A366B	Europe	A366BXXUCDZIF	September 2026	Over 2.3GB	October 19, 2026	SamMobile, Android Central
Galaxy A56	US open-market model	United States	A566U1UEUBDZJ1	Not reported	Not reported	October 20, 2026	SammyGuru only
Galaxy A36	US carrier models (T-Mobile, AT&T, US Cellular)	United States	A366USQUADZIF	Not reported	Not reported	October 20, 2026	SammyGuru only

Download sizes conflict between outlets. Sammy Fans lists about 2.8GB for the A56 and 2.7GB for the A36. SamMobile measured the A56 package at 2,314.37MB. Plan storage around the larger figure.

Why the A36's September patch matters

A36 owners on the global build get the September 2026 Security Maintenance Release (SMR). That's Samsung's monthly security bundle. Samsung's bulletin lists 18 critical Google fixes and 32 Samsung-specific items for that month. Two of those Samsung items are critical image decoder flaws that remote attackers could use to run code. SamMobile counts 58 fixes in the patch.

The October 2026 bulletin came out on October 6. It adds 9 more critical Google fixes and 27 Samsung items. A56 owners get those now. A36 owners will need a later update.

Samsung's own bulletin admits this trade-off. It warns that "regular OS upgrades may cause delays to planned security updates."

What changes on these phones, and what does not

The upgrade mostly brings interface and privacy changes. According to SamMobile, the Quick Panel now lets users resize the brightness and volume sliders and the media player. Controls can be rearranged, and the sound mode button can be split from the volume slider.

A new Warranty and care menu in Settings shows warranty details and runs diagnostics. Samsung India's support page already hosts a guide for it. Reports also mention a faster way to lock the phone, plus updates to Samsung DeX, Samsung Notes, accessibility and a location privacy indicator.

SamMobile reports one more A56 extra. Quick Share can now send files to iPhones, iPads and Macs through AirDrop. The toggle sits under Settings, Connected devices, Quick Share, Share with Apple devices. It needs updated Quick Share components from the Galaxy Store. No outlet has reported this on the A36 yet.

The new Galaxy AI features skip both phones. TechRepublic notes that Samsung's device list for Privacy Alerts, an on-device AI permission monitor, does not include the A56.

Confirmed, reported and still unclear

Confirmed by two or more outlets: both Korean builds, the A56 global build with the October patch, and the A36 European build with the September patch.

Reported by one outlet: SamMobile says the Middle East may have received the A56 first. SammyGuru alone reports the US builds. Sammy Fans reported on October 21 that both phones are rolling out in India, but no second outlet has confirmed it yet.

Unclear: when US open-market A36 units get the update, and when the A36 moves to the October patch. We found no reports of either phone getting the update in Africa so far.

Should you install One UI 9 now?

Galaxy A56 owners: install it when it appears. The build is current on security and has no device-specific bug reports so far.

Galaxy A36 owners: install it if your phone is on a patch older than September 2026. If you already have September, the upgrade brings features but no new security fixes.

Anyone who resets phones often: hold off on a factory reset after updating. Sammy Fans reports that Samsung acknowledged a setup-screen freeze on some Korean Galaxy S26 Ultra units running One UI 9, with a fix promised in the next OTA (over-the-air) update. PhoneArena also cited Reddit reports of some Galaxy A57, S24 and S26 Ultra units becoming unusable after updating. Neither issue has been reported on the A56 or A36.

To check, open Settings, then Software update, then Download and install. Use Wi-Fi and charge the phone first. TechRepublic advises against flashing firmware built for another model code.

How this rollout compares, and what comes next

The A36 and A56 went from Korea to global markets in four days. The Galaxy A57 took about six, going from Korea on October 6 to Europe on October 12, according to SammyGuru's tracker. Flagships like the Galaxy S25 series got One UI 9 a few weeks earlier.

PhoneArena notes this is the A36's second major Android upgrade, with four more expected. SammyGuru expects the wider One UI 9 rollout to finish by the end of November. Samsung India's completed-models list was last updated on October 13 and does not yet confirm either phone.

See our One UI 9 rollout and supported devices page for other models. If your phone isn't on it, check our list of Samsung phones that miss One UI 9. For what comes after this, read about One UI 9.5 testing on the Galaxy S26.