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Samsung is moving swiftly through its software development cycle, officially releasing the fourth beta of its One UI 9 skin for the Galaxy S26 series. Following the rollout of One UI 9 beta 3 last month, the new beta released today focuses squarely on optimizing performance, smoothing out the UI, and squashing persistent system bugs ahead of the final stable release later this year.
We’ve received the fourth One UI 9 update on our Galaxy S26 Ultra in the UK. This Android 17-based update comes with firmware version ending in ZZG4, the July 5, 2026 security patch, and is 1,250MB in size.
Aamir Siddiqui / Android AuthorityThe changelog doesn’t mention any major new features, but goes on to target several key bugs:
This update is already live in practically all beta regions like Germany, India, Poland, the UK, and South Korea, with the notable exception of the US. We expect users in the US who have signed up for the beta program to receive this update very soon as well. We’ll keep you updated if we find any new features or bigger changes in this update.
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