Samsung has released One UI 9, its version of Android 17, for the Galaxy A15 4G. South Korea got it first. Samsung’s release notes for the Korean model list build A155NKSUBEZJ6 on Wednesday 4th November 2026. Five days later, on Monday 9th November, Samsung added build A155FXXUCFZJ4 for the international model, the SM-A155F, to its release notes for Kenyan units. Both builds carry the 5th October 2026 security patch.
So if you bought your A15 4G in Kenya, the update is out for your phone. Samsung says the exact changes can differ by model, country and service provider, and its notes don’t say when every unit will see it. If it isn’t on yours yet, check again over the next few days.
What One UI 9 changes on the A15
There are no new Galaxy AI features on the list for this phone. Most of what you’ll notice is in the Quick panel, the screen you pull down from the top for things like brightness and Wi-Fi. You can now resize the brightness and volume sliders and the media player, and you can move the sound mode button out of the volume slider so it sits on its own.
Samsung has also added three privacy and security changes. A blue dot appears at the top of the screen whenever an app reads your location, and tapping it in the Quick panel tells you which app it is. You can lock the phone in a hurry by holding the Volume down and Side buttons together, or by tapping the Power button in the Quick panel. Once you do, your fingerprint or face won’t open it the next time, so you’ll need your PIN, pattern or password. And there’s a new Warranty and care menu in Settings, where you can check your warranty and run diagnostic checks.
Samsung Health gets a new design, with cards you can resize and group under headings like Activity, Sleep and Nutrition. For accessibility, Text spotlight shows any text you tap enlarged in its own window, and Select to speak reads out whatever you select without switching on the full TalkBack screen reader.
So on an A15 4G, the changes you’ll feel day to day are the Quick panel you can arrange your way and knowing when an app is checking where you are.
How many updates the A15 4G has left
Samsung announced the A15 4G on 11th December 2023 with Android 14 and One UI 6. On its product page for the SM-A155F, Samsung promises up to four generations of OS upgrades and five years of security maintenance.
Android 15 and One UI 7 reached Kenyan units in May 2025, as we reported at the time. Android 16 and One UI 8 followed on 27th November 2025. That makes Android 17 the third upgrade, and it leaves one more: Android 18 with One UI 10. Samsung hasn’t said when that will come. After it, the phone only gets security patches.
Those patches come every three months, because the A15 is on Samsung’s quarterly security update list. The flagships get them monthly. Five years from the December 2023 launch takes the A15 4G to about December 2028. That’s our count, because Samsung hasn’t given an end date.
The Galaxy A15 5G got Android 17 first. Samsung’s notes date it 2nd November in India, 3rd November in Europe and 5th November on T-Mobile in the US. Last month we covered the stable One UI 9 for the pricier Galaxy A56 and A36, which Samsung released on 19th October.
How to get it
Go to Settings, then Software update, then Download and install. It’s a whole new Android version, so it’s a big download. Connect to Wi-Fi, charge the phone and back up anything you can’t afford to lose first.
If you bought an A15 4G in 2024, you have one more Android version to wait for and, by our count, security patches until about the end of 2028. For a phone that’s almost three years old, that’s a good reason to hold on to it a while longer.
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