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    Latest Samsung Galaxy S21 Ultra (SM-G998N) - KTC firmware

    Samsung Galaxy S21 Ultra (SM-G998N) firmware for Korea (KT Corporation) (KTC): 37 builds in the SamMobile archive, newest first. The latest is G998NKSSCHZA9 (Android 15, built 5 March 2026). Open a build to download it, or switch region with the country selector.

    Model
    		Build date PDA Version
    SM-G998N Korea (KT Corporation) 2026-03-05 G998NKSSCHZA9 15
    SM-G998N Korea (KT Corporation) 2025-05-21 G998NKSS9HYE5 15
    SM-G998N Korea (KT Corporation) 2023-12-01 G998NKSU4FWK7 14
    SM-G998N Korea (KT Corporation) 2023-11-10 G998NKSS4EWK2 13
    SM-G998N Korea (KT Corporation) 2023-08-09 G998NKSU4EWH5 13
    SM-G998N Korea (KT Corporation) 2023-05-31 G998NKSU4EWE9 13
    SM-G998N Korea (KT Corporation) 2023-04-06 G998NKSU4EWCI 13
    SM-G998N Korea (KT Corporation) 2023-02-09 G998NKSU3EWB1 13
    SM-G998N Korea (KT Corporation) 2022-12-05 G998NKSU3DVL2 13
    SM-G998N Korea (KT Corporation) 2022-11-15 G998NKSU3DVKC 13
    SM-G998N Korea (KT Corporation) 2022-10-24 G998NKSU3DVJC 13
    SM-G998N Korea (KT Corporation) 2022-09-16 G998NKSS3CVI3 12
    SM-G998N Korea (KT Corporation) 2022-08-11 G998NKSU3CVH7 12
    SM-G998N Korea (KT Corporation) 2022-07-21 G998NKSU3CVGB 12
    SM-G998N Korea (KT Corporation) 2022-06-07 G998NKSU3CVF2 12
    SM-G998N Korea (KT Corporation) 2022-05-25 G998NKSU3CVEB 12
    SM-G998N Korea (KT Corporation) 2022-05-02 G998NKSU3CVE1 12
    SM-G998N Korea (KT Corporation) 2022-03-15 G998NKSU3CVC5 12
    SM-G998N Korea (KT Corporation) 2022-03-15 G998NKSU3CVC5 12
    SM-G998N Korea (KT Corporation) 2022-02-04 G998NKSU3BVA2 12
    SM-G998N Korea (KT Corporation) 2021-12-24 G998NKSU3BULF 12
    SM-G998N Korea (KT Corporation) 2021-12-22 G998NKSS3BULC 12
    SM-G998N Korea (KT Corporation) 2021-11-09 G998NKSU3BUK9 12
    SM-G998N Korea (KT Corporation) 2021-09-29 G998NKSS3AUIN 11
    SM-G998N Korea (KT Corporation) 2021-09-29 G998NKSS3AUIN 11
    SM-G998N Korea (KT Corporation) 2021-09-14 G998NKSU3AUIG 11
    SM-G998N Korea (KT Corporation) 2021-08-17 G998NKSU3AUHB 11
    SM-G998N Korea (KT Corporation) 2021-07-29 G998NKSU3AUGM 11
    SM-G998N Korea (KT Corporation) 2021-06-09 G998NKSU3AUF6 11
    SM-G998N Korea (KT Corporation) 2021-06-09 G998NKSU3AUF6 11
    SM-G998N Korea (KT Corporation) 2021-06-09 G998NKSU3AUF6 11
    SM-G998N Korea (KT Corporation) 2021-05-21 G998NKSU3AUE8 11
    SM-G998N Korea (KT Corporation) 2021-04-23 G998NKSU3AUDA 11
    SM-G998N Korea (KT Corporation) 2021-04-23 G998NKSU3AUDA 11
    SM-G998N Korea (KT Corporation) 2021-03-19 G998NKSU2AUC8 11
    SM-G998N Korea (KT Corporation) 2021-03-19 G998NKSU2AUC8 11
    SM-G998N Korea (KT Corporation) 2021-02-24 G998NKSS2AUBB 11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2026-03-05 G998NKSSCHZA9
    Version
    15
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2025-05-21 G998NKSS9HYE5
    Version
    15
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2023-12-01 G998NKSU4FWK7
    Version
    14
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2023-11-10 G998NKSS4EWK2
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2023-08-09 G998NKSU4EWH5
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2023-05-31 G998NKSU4EWE9
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2023-04-06 G998NKSU4EWCI
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2023-02-09 G998NKSU3EWB1
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-12-05 G998NKSU3DVL2
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-11-15 G998NKSU3DVKC
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-10-24 G998NKSU3DVJC
    Version
    13
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-09-16 G998NKSS3CVI3
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-08-11 G998NKSU3CVH7
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-07-21 G998NKSU3CVGB
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-06-07 G998NKSU3CVF2
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-05-25 G998NKSU3CVEB
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-05-02 G998NKSU3CVE1
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-03-15 G998NKSU3CVC5
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-03-15 G998NKSU3CVC5
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2022-02-04 G998NKSU3BVA2
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-12-24 G998NKSU3BULF
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-12-22 G998NKSS3BULC
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-11-09 G998NKSU3BUK9
    Version
    12
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-09-29 G998NKSS3AUIN
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-09-29 G998NKSS3AUIN
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-09-14 G998NKSU3AUIG
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-08-17 G998NKSU3AUHB
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-07-29 G998NKSU3AUGM
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-06-09 G998NKSU3AUF6
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-06-09 G998NKSU3AUF6
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-06-09 G998NKSU3AUF6
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-05-21 G998NKSU3AUE8
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-04-23 G998NKSU3AUDA
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-04-23 G998NKSU3AUDA
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-03-19 G998NKSU2AUC8
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-03-19 G998NKSU2AUC8
    Version
    11
    Model Country/Carrier
    SM-G998N Korea (KT Corporation)
    Build date PDA
    2021-02-24 G998NKSS2AUBB
    Version
    11