Samsung · PHONE PROFILE

Samsung Galaxy S23 Ultra

Name: Samsung Galaxy S23 Ultra
Brand: Samsung

The specifications, radiation measurements and practical choices for your phone.

Display6.8 inches

ChipsetQualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm)

FCC identifierA3LSMS918B

Compare this phone →Find a QuantaCase

RF Safe source record retrieved September 12, 2026. Regional specifications and test configurations may differ.

The SAR overview.

Reported US test values · W/kg averaged over 1 g of tissue

Head SAR · cellular only0.98 W/kg61% of US localized limit

Body SAR · cellular only1.10 W/kg69% of US localized limit

Hotspot SAR · cellular only1.20 W/kg75% of US localized limit

Head SAR · simultaneous1.59 W/kg99% of US localized limit

Body SAR · simultaneous1.59 W/kg99% of US localized limit

Hotspot SAR · simultaneous1.54 W/kg96% of US localized limit

0–0.400.41–0.800.81–1.201.21+ W/kgUS localized test values · 1 g average

Colors indicate reported SAR ranges, not a safety verdict. Results depend on test configuration and regional model. A lower listed maximum does not guarantee lower everyday exposure. How to read these numbers →

Additional SAR values & source information

Hotspot, cellular only (US)	1.20 W/kg
Product-specific source field (US)	1.20 W/kg
Head (EU, 10 g)	— W/kg
Body (EU, 10 g)	— W/kg
FCC ID	A3LSMS918B — FCC equipment search ↗
Source	RF Safe original phone profile ↗
Data note	Values are reported by the RF Safe source record and have not been independently re-tested here. Zero or blank source values are shown as not listed.

Your SAR comparison, at a glance.

Cellular-only and simultaneous-transmission values, side by side.

Samsung Galaxy S23 Ultra SAR comparison chart showing cellular-only versus simultaneous Wi-Fi and cellular test values — RF Safe source chart. Green and red compare lower and higher values within this chart; they differ from the fixed SAR ranges above. Percentage differences compare test configurations and do not predict a personal exposure reduction.
Open full-size chart ↗Download web-size chart ↓

Two views. One clearer picture.

RF Safe reference illustrations for this phone.

Head exposure reference

Samsung Galaxy S23 Ultra head SAR reference illustration

Body exposure reference

Samsung Galaxy S23 Ultra body SAR reference illustration

Source illustrations visualize the RF Safe record. They are not scans of an individual, a measured personal dose, or a forecast of disease. Read the numerical labels and the original test context.

A practical introduction.Read the illustrated usage guide →

BETTER PHONE HABITS

Put the numbers into practice.

Watch the phone safety introduction, then explore the illustrated guide to distance, carrying and correct QuantaCase orientation.

Explore the usage guide →

Every specification, in one place.

Source specifications by category. Regional models, software and availability may differ.

General

Phone	Samsung Galaxy S23 Ultra
Technology	GSM / CDMA / HSPA / EVDO / LTE / 5G
Announced	February 1, 2023
Availability (source snapshot)	Available
Price (historical source)	C$ 1,649.99 / ₹ 124,999 / $ 1,055.00 / £ 999.00 / € 1,170.00
Model Names	SM-S918B, SM-S918B/DS, SM-S918U, SM-S918U1, SM-S918W, SM-S918N, SM-S9180, SM-S918E, SM-S918E/DS

Display

Type	Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak)
Size	6.8 inches, 114.7 cm2 (~89.9% screen-to-body ratio)
Resolution	1440 x 3088 pixels (~500 ppi density)
Protection	Corning Gorilla Glass Victus 2
Features	Always-on display
Display Test	Contrast ratio: Infinite (nominal)

Camera

Main Camera	Quad Camera: 200 MP, f/1.7, 24mm (wide), 1/1.3", 0.6m, multi-directional PDAF, Laser AF, OIS 10 MP, f/4.9, 230mm (periscope telephoto), 1/3.52", 1.12m, Dual Pixel PDAF, OIS, 10x optical zoom 10 MP, f/2.4, 70mm (telephoto), 1/3.52", 1.12m, Dual Pixel PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm, 120 (ultrawide), 1/2.55", 1.4m, Dual Pixel PDAF, Super Steady video
Main Features	LED flash, auto-HDR, panorama
Video	8K@24/30fps, 4K@30/60fps, 1080p@30/60/240fps, 1080p@960fps, HDR10+, stereo sound rec., gyro-EIS
Selfie Camera	Single Camera: 12 MP, f/2.2, 26mm (wide), Dual Pixel PDAF
Selfie Camera Features	Dual video call, Auto-HDR, HDR10+
Selfie Camera Video	4K@30/60fps, 1080p@30fps

Battery

Type	Li-Ion 5000 mAh, non-removable
Battery Test	Endurance rating 126h
Charging	45W wired, PD3.0, 65% in 30 min (advertised) 15W wireless (Qi/PMA) 4.5W reverse wireless

Hardware

Operating system (source snapshot)	Android 13, One UI 5.1
Chipset	Qualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm)
CPU	Octa-core (1x3.36 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510)
GPU	Adreno 740
Performance	AnTuTu: 1241531 (v9) GeekBench: 4927 (v5.1) GFXBench: 67fps (ES 3.1 onscreen)
Internal Storage	256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM UFS 4.0
Card Slot	No
Sensors	Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer Samsung DeX, Samsung Wireless DeX (desktop experience support) Bixby natural language commands and dictation Samsung Pay (Visa, MasterCard certified) Ultra Wideband (UWB) support

Connectivity

Wi-fi	Wi-Fi 802.11 a/b/g/n/ac/6e, tri-band, Wi-Fi Direct
Bluetooth	5.3, A2DP, LE
USB	USB Type-C 3.2, OTG
GPS	GPS, GLONASS, BDS, GALILEO
NFC	Yes
Radio	No

Sound

Loudspeaker	Yes, with stereo speakers
3.5mm Jack	No
Loudspeaker Test	-25.6 LUFS (Very good)

Design

Type	Bar
Dimensions	163.4 x 78.1 x 8.9 mm (6.43 x 3.07 x 0.35 in)
Weight	234 g (8.25 oz)
Colors	Phantom Black, Green, Cream, Lavender, Graphite, Sky Blue, Lime, Red, BMW M Edition
Build	Glass front (Gorilla Glass Victus 2), glass back (Gorilla Glass Victus 2), aluminum frame

Network

Speed	HSPA, LTE-A (up to 7CA), 5G
SIM	Nano-SIM and eSIM or Dual SIM (2 Nano-SIMs and eSIM, dual stand-by) IP68 dust/water resistant (up to 1.5m for 30 min) Armor aluminum frame with tougher drop and scratch resistance (advertised) Stylus (Bluetooth integration, accelerometer, gyro)
2G Network	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only) CDMA 800 / 1900 & TD-SCDMA
3G Network	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1xEV-DO
4G Network	1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 48, 66, 71 - USA
5G Network	1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 38, 40, 41, 66, 75, 77, 78 SA/NSA/Sub6 - International 1, 7, 28, 41, 66, 71, 78, 258, 260, 261 SA/NSA/Sub6/mmWave - USA

Find the case for your phone.

Confirm the exact model before choosing a color.

Shop all cases →

QuantaCase RFS1 for Samsung Galaxy S23 Ultra

Currently unavailable · 3 options

$69.99Choose options ↗

QuantaCase is a directional shielding accessory and a habit-training tool. Correct orientation matters; a case does not make a phone risk-free. Explore the design →