Samsung Testing April 2026 Update for Galaxy S25 Series

Madhav BiradarMarch 27, 2026

Samsung has now started testing the April 2026 security patch for the Galaxy S25, S25+, and S25 Ultra smartphones. The new firmware has been spotted on Samsung’s internal database server and confirmed via Checkfirm. This confirms that after releasing the March 2026 security update and the new One UI 8.5 beta update, Samsung is now preparing the next April security update for these devices.

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New April Firmware Build for Galaxy S25 Ultra

Galaxy S25 April 2026 update spotted on Samsung’s internal test server is S938NKSS9BZCG, which has been upgraded from the current ‘BZC1’ firmware version. The last letter has changed from ‘1’ to ‘G,’ indicating that Samsung has moved on from the previous version and is now working on the next one, which is the April patch.

The company is developing the next patch, but that doesn’t mean it is the final test build. Before the actual release, Samsung will likely test the device a few more times to ensure a stable rollout. Also, in the first week of April, it will publish the official Security Bulletin on its website, where we will learn what changes have been made and which bugs have been fixed.

What to Expect in the April 2026 Security Patch

While Samsung has yet to announce the official Security Bulletin for the April firmware, it is expected to mark the beginning of the stable One UI 8.5 version. According to various sources and new firmware builds on the CheckFirm page, Samsung appears close to releasing a stable version for the Galaxy S25 series.

Currently, the Galaxy S25 has received the 8th beta version, and if everything goes according to Samsung’s plan, we could soon see the final or stable release.

When Will We Receive the April Patch on Galaxy S25?

There is no confirmed timeline for Samsung’s April 2026 security patch, and it will vary by country and carrier. For the February and March 2026 patches, Samsung took longer than expected due to the busy schedule surrounding the Galaxy S26 launch event. However, with the April 2026 security patch, Samsung may avoid further delays and release it earlier rather than pushing it to the end of the month.

Written by

Madhav Biradar

Madhav Biradar is the Lead Software Analyst and Founder of TizenHelp. With over 13 years of experience tracking the evolution of Samsung’s ecosystem—from the early days of Tizen OS to the latest One UI Build & releases — specializes in firmware deconstruction and beta-cycle analysis. Based in India, he has personally tested every flagship Galaxy device since the Galaxy S2, providing readers with hands-on insights that go beyond standard spec sheets. Expertise: One UI Updates, firmware leaks, Samsung Firmware Deployment, Galaxy Ecosystem Integration, etc.