Apple iPhone X vs Samsung Galaxy A51 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

9.0
Apple iPhone X
7.0
Samsung Galaxy A51
Apple iPhone X Samsung Galaxy A51
Released · Nov 03, 2017
Released · Dec 27, 2019
5.8-inch · 2436x1125px
6.5-inch · 2400x1080px
Dual camera
Quad camera
3GB · 256GB
4GB · 128GB
2716 mAh
4000 mAh
Check prices

Design

Dimensions
5.65 x 2.79 x 0.30 inches
143.6 x 70.9 x 7.7 mm
6.24 x 2.90 x 0.31 inches
158.5 x 73.6 x 7.9 mm
Weight
6.14 oz (174.0 g) 6.07 oz (172.0 g)
Materials
Back: Glass
Frame: Stainless steel
Back: Plastic
Frame: Plastic
Resistance
Water, Dust; IP67
Biometrics
3D Face unlock 2D Face unlock, Optical in-screen fingerprint
Keys
Left: Volume control, Other; Right: Lock/Unlock key Right: Volume control, Lock/Unlock key
Colors
Silver, Space gray Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue

Display

Size
5.8-inch 6.5-inch
Resolution
2436x1125px, 19.5:9 ratio, 459 PPI 2400x1080px, 20:9 ratio, 405 PPI
Technology
OLED Super AMOLED
Refresh rate
60Hz
Screen-to-body
82.35 % 87.37 %
Peak brightness
625 cd/m2 (nit)
Features
HDR support, Pressure-sensitive, Oleophobic coating, Scratch-resistant glass, Ambient light sensor, Proximity sensor Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip
Apple A11 Bionic APL1W72 (10 nm) Samsung Exynos 9611 (10 nm)
Processor
Hexa-core
2390 MHz
Monsoon and Mistral
Octa-core
2300 MHz
4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53
GPU
Apple 3-core GPU Mali-G72 MP3
Memory
3GB (LPDDR4)/256GB 4GB (LPDDR4)/128GB
Storage expansion
not expandable microSDXC up to 512 GB
OS
iOS (15.x, 14.x, 13.x, 12.x, 11.x) Android (11, 10)

Battery

Type
2716 mAh, Li - Ion 4000 mAh, Li - Polymer
Charging
USB Power Delivery
Qi wireless charging
Fast charging
Charge speed
Wired: 15.0W
Wireless: 7.5W
PhoneArena Battery Tests
Battery Life Estimate
Untested
Browsing
Untested
Video
Untested
Gaming
Untested
Battery Life Estimate
5h 22min
Browsing
11h 35min
Video
8h 35min
Gaming
6h 40min

Camera

Rear
Dual camera Quad camera
Main camera
12 MP (Sapphire crystal lens cover, OIS, PDAF, CMOS image sensor, BSI sensor)
Aperture size: F1.8
Focal length: 28 mm
Sensor size: 1/3"
Pixel size: 1.22 μm
48 MP (PDAF)
Aperture size: F2.0
Focal length: 26 mm
Sensor size: 1/2"
Pixel size: 0.8 μm
Second camera
12 MP (Telephoto, Sapphire crystal lens cover, OIS, PDAF, CMOS image sensor, BSI sensor)
Optical zoom: 2.0x
Aperture size: F2.4
Focal Length: 52 mm
Sensor size: 1/3.4"
Pixel size: 1 μm
12 MP (Ultra-wide)
Aperture size: F2.2
Focal Length: 13 mm
Pixel size: 1.12 μm
Third camera
5 MP (Macro)
Aperture size: F2.4
Focal Length: 40 mm
Fourth camera
5 MP (Depth information)
Aperture size: F2.2
Sensor size: 1/5"
Pixel size: 1.12 μm
Flash
Quad LED LED
Video recording
4K UHD (60 fps), 1080p (240 fps), 720p (30 fps)
OIS, Time-lapse video, Continuous autofocus, Video light, Video calling, Video sharing
4K UHD (30 fps), 1080p (120 fps), 720p (240 fps)
Hyperlapse, EIS
Front
7 MP (HDR)
Video capture: 1080p
32 MP (HDR)
Video capture: 1080p

Connectivity & Features

Bluetooth
5.0 5.0
WLAN
802.11 a,b,g,n,ac,dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
USB
Lightning Type-C, USB 2.0
Hearing aid compatible
M3/T4
Location
GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Barometer Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other
NFC, UMA (Wi-Fi Calling) NFC, ANT+

Multimedia

Headphones
No 3.5mm jack 3.5mm jack
Speakers
Earpiece, Multiple speakers Earpiece, Loudspeaker
Features
Dolby Atmos
Screen mirroring
Wireless screen share Wireless screen share
Radio
FM
Additional microphone(s)
Noise cancellation, Video recording Noise cancellation

Cellular

4G (FDD)
Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29(700 d), 30(2300 WCS), 66(AWS-3) Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 20, 25, 26, 28, 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 38, 39, 40, 41 Bands 38, 39, 41
3G
Bands 1, 2, 4, 5, 8 Bands 1, 2, 4, 5, 8
Data Speed
LTE-A Cat 12/13 (600/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type
Nano SIM Nano SIM
VoLTE
Yes

Regulatory Approval

FCC approval
Date approved: Nov 28, 2019
FCC ID value: A3LSMA515FN
Measured SAR
Head: 0.89 W/kg
Body: 1.18 W/kg
Simultaneous Transmission: 1.56 W/kg
Wireless Router: 1.12 W/kg
Phablet: 2.76 W/kg

Buyers information

MSRP
$ 1149 $ 400
In The Box
EarPods with Lightning Connector, Lightning to 3.5 mm Headphone Jack Adapter, Lightning to USB Cable, USB Power Adapter, Documentation

Availability

Officially announced
Sep 12, 2017 Dec 12, 2019

Alternative variants

with 64 GB storage
Memory 64GB
MSRP $ 999
with 128GB storage
Memory 6GB/128GB
A1865
for Verizon
4G (FDD) Bands 2, 3, 4, 5, 7, 13, 20, 28, 66(AWS-3)
3G Bands 5, 8, 2, 1
for AT&T
4G (FDD) Bands 2, 4, 5, 12, 13, 25, 26, 66(AWS-3), 71(600)
4G (TDD) Bands 41
for Sprint
4G (FDD) Bands 2, 4, 5, 12, 13, 25, 26, 66(AWS-3), 71(600)
4G (TDD) Bands 41
for Europe
4G (FDD) Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66(AWS-3)
4G (TDD) Bands 38, 40, 41
Dual SIM Yes
FCC OKs Cingular\'s purchase of AT&T Wireless