New Galaxy S23 update brings September 2026 security patch

TL;DR

Samsung has started rolling out a global update for Galaxy S23 phones with the September 2026 security patch.

The patch fixes 90 security issues, and the India build is 562.06MB with firmware version S91xBXXSAFZI1.

Samsung says the stable One UI 9.0 update for the Galaxy S23 series should arrive by October and will be the last major OS upgrade.

While Galaxy S23 users are eagerly waiting for the stable version of One UI 9.0 (Android 17), Samsung is rolling out a new software update for these phones that offers the September 2026 security patch. It fixes 90 security issues present in the previous firmware.

Samsung is rolling out the updates globally. The one for India is 562.06MB in size and carries firmware version S91xBXXSAFZI1 (via Kailash). You can check for the update’s availability and get it by going to Settings > Software update > Check for updates.

As for the stable version of One UI 9.0 for the Galaxy S23 series, Samsung has said that the brand will release it by October. That means people won’t have to wait for more than a month.

One UI 9.0 will be the last major update for the Galaxy S23 lineup. For your reference, Samsung launched these phones with One UI 5.1 (Android 13) and promised to offer four major OS updates.

Abid Iqbal Shaik - Writer

First Samsung device: Galaxy S II

I’m a computer science engineer living in Hyderabad, India, who has a keen interest in automobiles and consumer electronics. My journalism career kicked off in 2017 with MySmartPrice where I wrote news, features, buying guides, and explanatory articles about technology among other things, and reviewed many products, including smartphones, tablets, laptops, PC components, smartwatches, audio devices, wearables, and smart home products. Since then, I have worked for 91Mobiles, Apple, and Onsitego, before finally landing on SamMobile.

Firmware Phone Galaxy S23 Galaxy S23 Plus Galaxy S23 Ultra India September 2026 Security Patch