Mobile / Phones
SamsungPhone
Galaxy S21 5G
Released January 2021.4Press releasenews.samsung.com/us/samsung-galaxy-s21-ultra-unpacked-2021-ultimate-smartphone-experience-designed-epicRead 5 October 2026January 29 maker update retrospectively confirms the S21 series now available. Family retail month only. US hardware, radios and bundle excluded. Last checked 23 October 2026.
- Screen size
- 6.2in
- Chipset
- Exynos 2100
- Main camera
- 12MP
- Rated battery capacity
- 3,880mAh
81 of 162 fields known.
General
- Model numbers
- SM-G991B/DS2Maker product pagesamsung.com/uk/support/model/SM-G991BZADEUARead 5 October 2026Exact UK SKU and covered native EU manual identifier SM-G991B/DS.
- GTIN / EAN
- Not available
- Announced
- 14 January 20213Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Status
- Not available
- Predecessor
- Not available
- Successor
- Samsung Galaxy S229Reviewgsmarena.com/samsung_galaxy_s22-review-2396p2.phpRead 23 October 2026GSMArena's review of the Galaxy S22 calls the Galaxy S21 its predecessor.
- Launch price (US)
- Not available
- Launch price (EU)
- Not available
- Colours
- Phantom Violet, Phantom Grey, Phantom Pink, Phantom White3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Form factor
- Bar1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- OS support period (claimed)
- Not available
- Security support period (claimed)
- 5years5Press releasenews.samsung.com/us/samsung-galaxy-os-upgrade-one-ui-android-unpacked-2022Read 5 October 2026February 2022 policy expressly includes S21 and S21+ in up to five years of security updates. Starting basis unstated. OS generations are not converted to years.
- Security updates until
- Not available
Body
Front and side, drawn to scale.
- Height
- 151.7mm1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Width
- 71.2mm1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Thickness
- 7.9mm1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Thickness with camera bump
- Not available
- Folded dimensions
- Not available
- Weight
- 169g(6 oz)1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Frame
- Not available
- Front
- Not available
- Dust and water rating
- IP683Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Water resistance depth
- 1.5m3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026IP68 laboratory scope up to 1.5 m freshwater for 30 minutes. Not beach or pool use.
- Water resistance time
- 30min3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026Same freshwater laboratory scope.
- MIL-STD-810
- Not available
- SIM capacity
- Nano-SIMs2eSIM onlyNo1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026Two physical nano-SIM positions. Embedded SIM presence is explicit, but maximum simultaneous active eSIM count is unstated and omitted.
- Stylus
- Not available
- Stylus name
- Not available
Display
- Screen size
- 6.2in(15.7 cm)1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Resolution
- 1080 × 2400px1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Pixel density
- 424.5ppi
- Aspect ratio
- Not available
- Display type
- OLED1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Display type (as published)
- Dynamic AMOLED 2X1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Max refresh rate
- 120Hz3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Min refresh rate
- 48Hz3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Touch sampling rate
- Not available
- Instant touch sampling
- Not available
- Display brightness (typical, claimed)
- Not available
- Outdoor brightness (claimed)
- Not available
- Peak display brightness (claimed)
- Not available
- Minimum brightness
- Not available
- Colour depth per channel
- Not available
- DCI-P3 coverage
- Not available
- HDR playback formats
- HDR10+3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- PWM dimming frequency
- Not available
- Front camera cutout
- Punch hole3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Cover screen size
- Not available
- Cover screen resolution
- Not available
- Cover screen refresh rate
- Not available
- Cover screen type
- Not available
Platform
- OS at launch
- Android 113Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Latest stable OS (verified)
- Not available
- Chipset
- Exynos 21003Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- CPU cores
- 81Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- CPU configuration
- Not available
- Max CPU clock
- Not available
- GPU
- Mali-G78 MP146Reviewnotebookcheck.net/Samsung-Galaxy-S21-smartphone-review-The-most-affordable-high-end-Galaxy.522690.0.htmlRead 5 October 2026
- NPU performance
- Not available
Memory
- Storage (nominal)
- 128GB1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Memory card
- None6Reviewnotebookcheck.net/Samsung-Galaxy-S21-smartphone-review-The-most-affordable-high-end-Galaxy.522690.0.htmlRead 5 October 2026
- Max card size
- Not available
Rear cameras
- Physical rear cameras
Role Resolution (MP) Aperture (f/) Pixel size (µm) Autofocus OIS Field of view Main 12 1.8 1.8 Dual Pixel PDAF Yes 79° Ultrawide 12 2.2 1.4 Fixed Not available 120° Telephoto 64 2 0.8 PDAF Yes 76° - Number of rear cameras
- 3
- Main camera
- 12MP
- Longest physical-lens optical zoom
- Not available
- Maximum photo digital zoom
- 30×1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Flash
- Rear flash1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Camera features
- Not available
- Maximum rear video rate per resolution
Width (px) Height (px) Highest capture rate (fps) 7680 4320 24 1920 1080 240 - Max video resolution
- 7680 × 4320px
- Recorded video HDR formats
- HDR10+7Owner's manualdownloadcenter.samsung.com/content/UM/202401/20240125145825791/SM-G99X_UM_EU_RR_Eng_Rev.1.1_210304.pdfRead 5 October 2026Camera setting printed page 64 explicitly HDR10+ recording, distinct from playback formats.
- Log recording
- Not available
- Video recording codecs
- HEVC8Owner's manualdownloadcenter.samsung.com/content/UM/202401/20240125145825791/SM-G99X_UM_EU_RR_Eng_Rev.1.1_210304.pdfRead 5 October 2026Printed page 64 explicitly HEVC video recording. Slow and super-slow motion cannot use HEVC.
- Video stabilisation
- OIS, EIS7Owner's manualdownloadcenter.samsung.com/content/UM/202401/20240125145825791/SM-G99X_UM_EU_RR_Eng_Rev.1.1_210304.pdfRead 5 October 2026Printed page 64 video anti-shake. Main and telephoto OIS separately proved by own physical lens table.
- Maximum slow-motion capture rate
- Not available
Front camera
- Front cameras
Role Resolution (MP) Aperture (f/) Pixel size (µm) Autofocus Field of view Main 10 2.2 1.22 Dual Pixel PDAF 80° Source1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026Exact API front 10 MP, f/2.2 and autofocus Yes. API does not name its autofocus system. Dual Pixel AF, FOV and pixel pitch are independently explicit in this model's UK launch table.3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026- Maximum front video rate per resolution
- Not available
- Front autofocus
- Yes
Audio
Network
- Network
- GSM, UMTS, LTE, 5G1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026GSM, LTE and 5G explicit. The WCDMA/UMTS band list establishes UMTS. HSPA is not inferred.
- 2G bands
- GSM850, GSM900, DCS1800, PCS19001Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- 3G bands
- B1(2100), B2(1900), B4(AWS), B5(850), B8(900)1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026Manufacturer band identifiers with printed frequency/AWS qualifiers, not individual channel frequencies.
- 4G bands
- B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B17(700), B18(800), B19(800), B20(800), B25(1900), B26(850), B28(700), B32(1500), B66(AWS-3), B38(2600), B39(1900), B40(2300), B41(2500)1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026Manufacturer band identifiers with printed frequency/AWS qualifiers.
- 5G bands
- N1(2100), N3(1800), N5(850), N7(2600), N8(900), N20(800), N28(700), N66(AWS-3), N38(2600), N40(2300), N41(2500), N77(3700), N78(3500)1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026Manufacturer Sub6 band identifiers with printed frequency/AWS qualifiers. No mmWave absence inferred.
- 5G modes
- Not available
- 5G mmWave
- Not available
- Maximum modem download rate
- Not available
- Satellite
- Not available
- Wi-Fi calling
- Not available
Connectivity
- Wi-Fi bands
- 2.4 GHz, 5 GHz1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Bluetooth
- 5.01Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Bluetooth audio codecs
- Not available
- Ultra-wideband
- Not available
- Positioning
- GPS, Glonass, Beidou, Galileo1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Dual-frequency GNSS
- Not available
- Connector
- USB-C1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- USB data standard
- USB 3.2 Gen 11Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Video out over USB
- Yes3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026Explicit wired DisplayPort over USB-C with HDMI adapter, up to 4K60.
- IR blaster
- Not available
- FM radio
- Not available
Features and sensors
- Fingerprint
- Ultrasonic, under-display3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Face unlock
- Not available
- Sensors
- Accelerometer, Barometer, Fingerprint Sensor, Gyro Sensor, Geomagnetic Sensor, Hall Sensor, Light Sensor, Proximity Sensor1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Extra buttons
- Not available
- Haptic motor
- Not available
Battery and charging
- Rated battery capacity
- 3,880mAh3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026Explicit rated minimum for this model, separate from typical capacity.
- Battery capacity (typical)
- 4,000mAh1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026
- Rated battery energy
- Not available
- Battery type
- Li-ion6Reviewnotebookcheck.net/Samsung-Galaxy-S21-smartphone-review-The-most-affordable-high-end-Galaxy.522690.0.htmlRead 5 October 2026
- Claimed battery life
Use case Hours (h) Video playback 20 Audio playback 68 Talk time 33 - Maximum wired charging power (claimed)
- 25W6Reviewnotebookcheck.net/Samsung-Galaxy-S21-smartphone-review-The-most-affordable-high-end-Galaxy.522690.0.htmlRead 5 October 2026Own power-consumption section explicitly handset maximum 25 W.
- Wired charging standards
- USB Power Delivery 3.0 PPS, AFC, Quick Charge 2.03Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Charge 0 to 50% (claimed)
- Not available
- Charge 0 to 100% (claimed)
- Not available
- Wireless charging
- Yes3Press releasenews.samsung.com/uk/make-every-day-epic-with-samsung-galaxy-s21-5g-and-galaxy-s21-5gRead 5 October 2026
- Wireless charging power
- 15W6Reviewnotebookcheck.net/Samsung-Galaxy-S21-smartphone-review-The-most-affordable-high-end-Galaxy.522690.0.htmlRead 5 October 2026Own power-consumption section explicitly wireless maximum 15 W.
- Wireless standards
- Not available
- Built-in alignment magnets
- Not available
- Reverse wireless output power
- Not available
- Reverse wired
- Not available
- Included adapter rated power
- Not available
Measured
We could not find any of these 9 fields. Show them
- Geekbench single-core
- Not available
- Geekbench multi-core
- Not available
- 3DMark Wild Life Extreme
- Not available
- AnTuTu
- Not available
- Display brightness (measured)
- Not available
- PWM dimming (measured)
- Not available
- Mixed-use battery life (measured)
- Not available
- Full charge time (measured)
- Not available
- Loudspeaker loudness (measured)
- Not available
EU label and regulatory
We could not find any of these 10 fields. Show them
- EU energy class
- Not available
- Battery endurance per cycle (EU test)
- Not available
- Battery endurance in cycles (EU test)
- Not available
- Drop resistance class
- Not available
- Repairability class
- Not available
- SAR head (US)
- Not available
- SAR body (US)
- Not available
- SAR head (EU)
- Not available
- SAR body (EU)
- Not available
- Hearing aid compatibility
- Not available
In the box
We could not find any of these 1 fields. Show them
- In the box
- Not available
Links
- Product page
- www.samsung.com/uk/support/model/SM-G991BZADEUA2Maker product pagesamsung.com/uk/support/model/SM-G991BZADEUARead 5 October 2026
- Spec sheet
- searchapi.samsung.com/v6/front/b2c/product/spec/detail1Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 5 October 2026Exact UK SM-G991BZADEUA maker specification table.
- Manual
- downloadcenter.samsung.com/content/UM/202401/20240125145825791/SM-G99X_UM_EU_RR_Eng_Rev.1.1_210304.pdf8Owner's manualdownloadcenter.samsung.com/content/UM/202401/20240125145825791/SM-G99X_UM_EU_RR_Eng_Rev.1.1_210304.pdfRead 5 October 2026Original native English EU guide cover includes SM-G991B/DS.
- EPREL registration number
- Not available
Warranty
We could not find any of these 1 fields. Show them
- Manufacturer warranty (source market)
- Not available
Compare with
Pick a phone to see both side by side. Differences are marked yellow.
Sources
We read 9 sources for this phone. The numbers match the markers in the sheet.
- Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detail
- Maker product pagesamsung.com/uk/support/model/SM-G991BZADEUA
See a wrong value? Tell us and name the field.
SuccessorSamsung Galaxy S22