The Galaxy A51 5G, Galaxy A41, and Galaxy M01 no longer receive firmware updates from Samsung. Updates of any kind will no longer be sent to these devices. When the Galaxy A51 5G was first released in April 2020, it ran Android 10. As of right now, it runs Android 13.

When the Galaxy A41 debuted in May 2020, it was likewise running Android 10. It was later updated to Android 12 and is still receiving security upgrades as of right now. In June 2020, the Galaxy M01 was finally introduced, and similar to the A41, it was upgraded from Android 10 to Android 12.

As per Samsung's update guarantees at the time of their launches, all of these devices were supported with at least security updates for four years after their respective releases. Since those four years are now over, it's probably time to find a replacement if you own one of these.