The Galaxy A15 moves from One UI 8.5 to One UI 9 and Android 17 in Europe, the Middle East, Africa and Asia-Pacific. The update also lifts the security patch from August to October 2026.
Samsung has started rolling out One UI 9, based on Android 17, to the Galaxy A15 (SM-A155F) outside South Korea. Samfrew's catalogue picked up the new firmware, A155FXXUCFZJ4, in all 52 of the phone's CSCs on November 9, 2026, within about ten minutes starting at 09:02 UTC.
Korea got there first: the Korean model (SM-A155N) has had One UI 9 since November 4.
What the firmware says
Samfrew reads these details straight from the firmware files:
- Software: One UI 9.0 on Android 17 (API level 37), up from One UI 8.5 on Android 16
- Security patch: October 5, 2026, up from August 5, 2026 on the previous build (A155FXXSCEZH3, which arrived in September)
- Build number: CP2A.260605.016.A155FXXUCFZJ4
- Bootloader revision: C, unchanged from the previous build
- Linux kernel: 6.12.69, up from 6.12.38
- CSC: A155FOXMCFZJ4 in Europe, Russia, Kazakhstan and Georgia; A155FOJMCFZJ5 in the Middle East and Africa; A155FOLMCFZJ4 in Asia-Pacific; A155FOLECFZJ4 in Indonesia; A155FPNGCFZJ4 in Papua New Guinea and A155FVFJCFZJ4 in Fiji
- Download size: 9.4 GB for the European firmware
Three Android upgrades since launch
The Galaxy A15 launched in December 2023 with Android 14. Samfrew's catalogue first saw Android 15 for it in May 2025 and Android 16 in November 2025, so One UI 9 is its third major Android upgrade.
Where it's rolling out
Every SM-A155F CSC in Samfrew's catalogue has it:
- Europe: unlocked phones in the EEA (EUX) and the rest of Europe (EUY), plus the UK, France, Ireland, Portugal, Poland, the Czech Republic, Croatia and Serbia.
- Russia, Kazakhstan and Georgia.
- Middle East and Africa: Türkiye, the UAE, Saudi Arabia, Iraq, Israel, Egypt, Libya, Tunisia, Morocco, Nigeria, Ghana, Senegal, Kenya, South Africa and other southern African countries, plus Pakistan and Afghanistan.
- Asia-Pacific: Australia, New Zealand, Singapore, Malaysia, Indonesia, Thailand, Vietnam, the Philippines, Papua New Guinea and Fiji.
Not there yet: Latin America (SM-A155M) is still on One UI 8.5 (Android 16) with the August 5, 2026 security patch.
As with every big release, not every phone will see the update notification on day one.
How to update
On the phone, open Settings → Software update → Download and install. Rollout timing can vary by country and carrier.
If you'd rather flash it yourself, use firmware that matches your model and CSC. A Galaxy phone won't accept firmware with a lower bootloader revision than the one it already runs; this update keeps the previous revision. On Samfrew:
Every other CSC is on the SM-A155F firmware page. Each release page also has a Software details box with the One UI version, security patch and build number read from the firmware.
See specs, variants and full firmware history on Samfrew: Galaxy A15.
Sources: the firmware itself and Samfrew's firmware catalogue. Checked November 9, 2026.