SM-G991N firmware – Samsung Galaxy S21 5G | SamFrewPhone · Samsung Galaxy S21 5G
SM-G991N firmware
Stock firmware and official updates for the Samsung Galaxy S21 5G (SM-G991N), by region.
- Model code
- SM-G991N
- Released
- Jan 2021
- Latest build
- G991NKSSCHZA9
- Newest Android
- Android 15
- Regions
- 4 CSCs · 1 countries
Update policySecurity updates endedLast on Samsung's security update list in Jan 2026
Latest firmwareAndroid 15G991NKSSCHZA9 · built Mar 5, 2026
South Korea KTCBuilds in our firmware catalog, newest first.
G991NKSSCHZA9AndroidAndroid 15BuiltMar 5, 2026Regions4 CSCs
G991NKSSCHZA5AndroidAndroid 15BuiltJan 12, 2026Regions4 CSCs
G991NKSSBHYK5AndroidAndroid 15BuiltNov 11, 2025Regions4 CSCs
G991NKSSAHYH5AndroidAndroid 15
Taken from the SM-G991B; this model can differ (chipset, network bands).
Display
- Display size
- 158.4mm (6.2" full rectangle) / 154.6mm (6.1" rounded corners)
- Resolution
- 2400 x 1080 (FHD+)
- Display type
- Dynamic AMOLED 2X
Platform
- CPU speed
- 2.9GHz, 2.8GHz, 2.2GHz
- CPU cores
- Octa-Core
Memory
- RAM
- 8 GB
- Storage
- 128 GB
Camera
- Rear camera
- 12.0 MP + 64.0 MP + 12.0 MP
- Rear camera aperture
- F1.8 , F2.0 , F2.2
- Front camera
- 10.0 MP
- Video recording
- UHD 8K (7680 x 4320) @24fps
Battery
- Battery
- 4000 mAh
- Talk time
- Up to 33
Body
- Dimensions
- 151.7 x 71.2 x 7.9 mm
Build
AndroidAndroid 15
Security patch—
BuiltMar 5, 2026
BuiltAug 1, 2025
Regions4 CSCs
G991NKSS9HYE5AndroidAndroid 15BuiltMay 21, 2025Regions4 CSCs
G991NKSU8HYD9AndroidAndroid 15BuiltApr 15, 2025Regions4 CSCs
G991NKSS8GYC1AndroidAndroid 14BuiltMar 5, 2025Regions4 CSCs
G991NKSS8GYA1AndroidAndroid 14BuiltJan 7, 2025Regions4 CSCs
G991NKSS8GXL1AndroidAndroid 14BuiltDec 3, 2024Regions4 CSCs
G991NKSS8GXK1AndroidAndroid 14BuiltNov 6, 2024Regions4 CSCs
G991NKSS7GXJ1AndroidAndroid 14BuiltOct 8, 2024Regions4 CSCs
G991NKSS6GXI2AndroidAndroid 14BuiltSep 6, 2024Regions4 CSCs
G991NKSS6GXGJAndroidAndroid 14BuiltAug 2, 2024Regions4 CSCs
G991NKSS6GXG2AndroidAndroid 14BuiltJul 10, 2024Regions4 CSCs
G991NKSS5GXF1AndroidAndroid 14BuiltJun 4, 2024Regions4 CSCs
G991NKSS5GXE1AndroidAndroid 14BuiltMay 13, 2024Regions4 CSCs
G991NKSU4GXDCAndroidAndroid 14BuiltApr 19, 2024Regions4 CSCs
G991NKSU4FXD3AndroidAndroid 14BuiltApr 4, 2024Regions4 CSCs
G991NKSS4FXADAndroidAndroid 14BuiltJan 30, 2024Regions4 CSCs
G991NKSU4FWK7AndroidAndroid 14BuiltDec 1, 2023Regions4 CSCs
G991NKSU4EWE9AndroidAndroid 13BuiltMay 31, 2023Regions4 CSCs
G991NKSU4EWCHAndroidAndroid 13BuiltMar 28, 2023Regions4 CSCs
G991NKSU3EWB1AndroidAndroid 13BuiltFeb 9, 2023Regions4 CSCs
G991NKSU3DVL2AndroidAndroid 13BuiltDec 5, 2022Regions4 CSCs
G991NKSU3DVKCAndroidAndroid 13BuiltNov 15, 2022Regions4 CSCs
G991NKSU3DVJCAndroidAndroid 13BuiltOct 24, 2022Regions4 CSCs
G991NKSS3CVI3AndroidAndroid 12BuiltSep 16, 2022Regions4 CSCs
G991NKSU3CVH7AndroidAndroid 11BuiltAug 11, 2022Regions4 CSCs
G991NKSU3CVGBAndroidAndroid 12BuiltJul 21, 2022Regions4 CSCs
G991NKSU3CVF1AndroidAndroid 12BuiltJun 3, 2022Regions4 CSCs
G991NKSU3CVEBAndroidAndroid 12BuiltMay 25, 2022Regions4 CSCs
G991NKSU3CVE1AndroidAndroid 12BuiltMay 2, 2022Regions1 CSC
G991NKSU3CVDDAndroidAndroid 12BuiltApr 25, 2022Regions3 CSCs
G991NKSU3CVC5AndroidAndroid 12BuiltMar 15, 2022Regions4 CSCs
G991NKSU3BVA2AndroidAndroid 12BuiltFeb 3, 2022Regions4 CSCs
G991NKSU3BULFAndroidAndroid 12BuiltDec 24, 2021Regions4 CSCs
G991NKSS3BULCAndroidAndroid 12BuiltDec 22, 2021Regions4 CSCs
G991NKSU3BUKGAndroidAndroid 12BuiltNov 23, 2021Regions4 CSCs
G991NKSU3BUK9AndroidAndroid 12BuiltNov 9, 2021Regions4 CSCs
G991NKSS3AUINAndroidAndroid 11BuiltSep 28, 2021Regions4 CSCs
Connectivity
- Wi-Fi
- 802.11 a/b/g/n/ac/ax 2.4G+5GHz, HE80, MIMO, 1024-QAM
- Bluetooth
- Bluetooth v5.0
- NFC
- Yes
- USB
- USB 3.2 Gen 1
- Positioning
- GPS, Glonass, Beidou, Galileo
