If you’re the owner of a Samsung Galaxy smartphone but maybe can’t quite remember which model it is that you have, it might be worth checking today. That’s because Samsung has just confirmed it has stopped supporting three very popular Galaxy phones, meaning they will no longer receive any kind of software updates.

As spotted by Techradar, Samsung has quietly updated its official security update web page, removing the Galaxy S21, Galaxy S21 Plus and Galaxy S21 Ultra from all lists.

The page lists Samsung devices which are still receiving monthly or quarterly security updates. These are different to Android platform updates, which upgrade phones, tablets and wearables to newer Android versions.

Sometimes, manufacturers continue to send security updates to Android devices, meaning even if they don’t have the latest version of Android, they will still be fully secure from the latest bugs and flaws that could leave devices otherwise less secure to use, or leave personal data susceptible to hacks.

The S21, S21 Plus and S21 Ultra are no longer on the list, indicating these phones will never receive another software update. If you have one of these phones, unfortunately it may be time to consider a new phone.

Released in 2021, the phones ushered in a triple lens design that has persisted right up to the latest Galaxy S25 phones, though the S21 was unusual for a flagship smartphone in that it had a plastic, not glass, back panel.

The slightly larger S21 Plus was joined by the S21 Ultra, which had a great design but did not come with the S Pen stylus built into the device. Instead, you could buy one separately. Samsung rectified this decision, which began with 2020’s Galaxy S20 Ultra, by returning the S Pen to 2022’s S22 Ultra.

On release in January 2021, Samsung promised four years of Android OS updates and five years of security updates for the Galaxy S21 series. Given it’s now February 2026, it’s no surprise Samsung has stopped software support, five years on.

Samsung’s latest Galaxy S phones come with a guarantee of seven years of Android and security updates, meaning 2025’s Galaxy S25 phones should be fully secure until January 2032.

If you have a Galaxy S21 FE, this phone is still on the list as receiving quarterly security updates. Released in January 2022, we can expect it to get updates for at least another year from now.

If you have one of the affected S21 phones and would like to upgrade to a Samsung phone, you might want to wait a week or two. The firm is heavily rumoured to be readying the release of the Galaxy S26 series, thought to be announced later in February.