RFRF SAFE PHONES
RF
RF Safe Phones @rfsafe
Independent specifications + SAR context
Samsung
Samsung Galaxy S21 Ultra
Complete phone profile

Samsung Galaxy S21 Ultra

A fast, evidence-aware guide to specifications, connectivity, hardware, and radiofrequency exposure measurements.

6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)Android 11, One UI 3.1FCC ID A3LSMG998U

At a glance

The facts most people need before the deep specification sheet.

Display6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
ProcessorExynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
Operating systemAndroid 11, One UI 3.1
BatteryLi-Ion 5000 mAh, non-removable
Main cameraQuad Camera: 108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8m, PDAF, Laser AF, OIS 10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22m, dual pixel PDAF, OIS, 10x optical zoom 10 MP, f/2.4, 72mm (telephoto), 1/3.24", 1.22m, dual pixel PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4m, dual pixel PDAF, Super Steady video
NetworkGSM / CDMA / HSPA / EVDO / LTE / 5G
Announced2021-01-14 22:28:20
Dimensions165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in)
SAR
Hybrid SAR profile
Cellular-only and simultaneous transmitters
US limit 1.6 W/kg
Head · Cellular
0.77 W/kg
48.1% of 1.6#30
Body · Cellular
1.02 W/kg
63.7% of 1.6#34
Hotspot · Cellular
1.16 W/kg
72.5% of 1.6#47
Head · Wi-Fi + Cell
1.17 W/kg
73.1% of 1.6#15
Body · Wi-Fi + Cell
1.57 W/kg
98.1% of 1.6#66
Hotspot · Wi-Fi + Cell
1.59 W/kg
99.4% of 1.6#64
PositionCellular onlyDifferenceWi-Fi + cellular
Head0.77 W/kg 48.13% · #3034.2% lower1.17 W/kg 73.13% · #15
Body1.02 W/kg 63.75% · #3435.0% lower1.57 W/kg 98.13% · #66
Hotspot1.16 W/kg 72.50% · #4727.0% lower1.59 W/kg 99.38% · #64

Difference = (1 − cellular-only ÷ simultaneous) × 100. Rank and percentage values come from the supplied RF Safe cache. SAR is a compliance measurement, not an individualized health prediction.

Complete specifications

Factual fields are shown first. Longer cached editorial notes remain expandable to keep the page fast to scan.

◉  General
Phone
Samsung Galaxy S21 Ultra
Technology
GSM / CDMA / HSPA / EVDO / LTE / 5G
Announced
2021-01-14 22:28:20
Status
Available. Released 2021, January 29
Price
$ 789.00 / € 1,079.00 / £ 949.99 / ₹ 101,600
Model Names
SM-G998B, SM-G998B/DS, SM-G998U, SM-G998U1, SM-G998W, SM-G998N, SM-G9980
▣  Display
Type
Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak)
Size
6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
Resolution
1440 x 3200 pixels, 20:9 ratio (~515 ppi density)
Protection
Corning Gorilla Glass Victus
Features
Corning Gorilla Glass Victus Always-on display
◎  Camera
Main Camera
Quad Camera: 108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8m, PDAF, Laser AF, OIS 10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22m, dual pixel PDAF, OIS, 10x optical zoom 10 MP, f/2.4, 72mm (telephoto), 1/3.24", 1.22m, dual pixel PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4m, dual pixel PDAF, Super Steady video
Main Features
LED flash, auto-HDR, panorama
Video
8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS
Selfie Camera
Single Camera: 40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7m, PDAF
Selfie Camera Features
Dual video call, Auto-HDR
Selfie Camera Video
4K@30/60fps, 1080p@30fps
ϟ  Battery
Type
Li-Ion 5000 mAh, non-removable
Charging
Fast charging 25W USB Power Delivery 3.0 Fast Qi/PMA wireless charging 15W Reverse wireless charging 4.5W
◆  Hardware
Operating System
Android 11, One UI 3.1
Chipset
Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
CPU
Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - InternationalOcta-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680) - USA/China
GPU
Mali-G78 MP14 - InternationalAdreno 660 - USA/China
Performance
AnTuTu: 657150 (v8) GeekBench: 3518 (v5.1) GFXBench: 33fps (ES 3.1 onscreen)
Internal Storage
128GB 12GB RAM, 256GB 12GB RAM, 512GB 12GB RAM, 512GB 16GB RAM
Card Slot
No
Sensors
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
⌁  Connectivity
Wi-fi
Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot
Bluetooth
5.2, A2DP, LE
USB
USB Type-C 3.2, USB On-The-Go
GPS
Yes, with A-GPS, GLONASS, BDS, GALILEO
NFC
Yes
Radio
FM radio (Snapdragon model only; market/operator dependent)
◒  Sound
Loudspeaker
Yes, with stereo speakers
3.5mm Jack
No
◇  Design
Type
Bar
Dimensions
165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in)
Weight
227 g (Sub6), 229 g (mmWave) (8.01 oz)
Colors
Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Build
Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame
⌁  Network
Speed
HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G
SIM
Single SIM (Nano-SIM and/or eSIM) or Dual SIM (Nano-SIM and/or eSIM, dual stand-by)
2G Network
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only)
3G Network
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G Network
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G998U1
5G Network
2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G998U1