Samsung has taken a strong stance on security by offering extensive support for security updates for its smartphones.
All Z, S, Note, A, M, XCover and Tab series Galaxy phones, launched since 2019 will receive at least 4 years of security updates. At the time of writing, there are over 130 models.

Now these are security updates and not major operating system updates. Samsung recently promised 3 generations of Android operating system updates for its flagships, but that’s a whole different thing.
Security updates can be quarterly or monthly, and they may take longer to access a specific device, depending on its location or carrier.
Here is the full list of devices eligible for at least 3 years of security updates. Interestingly, the Galaxy A02 is not mentioned (although the A02 is), nor the Galaxy M02 and M02, so we cannot verify if they are among the supported devices.
- Galaxy Foldable devices: Fold, Fold 5G, Fold Z2, Fold Z2 5G, Flip Z, Flip Z 5G
- Galaxy S Series: S10, S10 +, S10e, S10 5G, S10 Lite, S20, S20 5G, S20 +, S20 + 5G, S20 Ultra, S20 Ultra 5G, S20 FE, S20 FE 5G, S21 5G, S21 + 5G, S21 Ultra 5G
- Galaxy Note Series: Note10, Note10 5G, Note10 +, Note10 + 5G, Note10 Lite, Note20, Note20 5G, Note20 Ultra, Note20 Ultra 5G
- Galaxy A Series: Galaxy A series: A10, A10e, A10s, A20, A20s, A30, A30s, A40, A50, A50s, A60, A70, A70s, A80, A90 5G, A11, A21, A21s, A31, A41, A51, A51 5G, A71, A71 5G, A02s, A12, A32 5G, A42 5G
- Galaxy M Series: M10s, M20, M30, M30s, M40, M11, M12, M21, M31, M31s, M51
- Galaxy XCover Series: XCover4s, XCover FieldPro, XCover Pro
- Galaxy Tab Series: Tab Active Pro, Tab Active3, Tab A 8 (2019), Tab A with S Pen, Tab A 8.4 (2020), Tab A7, Tab S5e, Tab S6, Tab S6 5G, Tab S6 Lite, Tab S7, Tab S7 +


