Comparison between:
- OnePlus 7T
- Xiaomi Mi A1
- Realme X2

Brand and model

Information about the brand, model and model alias (if any) of a specific device.

OnePlus 7TXiaomi Mi A1Realme X2
OnePlus 7T
Prices
Xiaomi Mi A1
Prices
Realme X2
Prices
Model alias--Realme X2

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width74.44 mm
7.444 cm
0.244 ft
2.931 in
75.8 mm
7.58 cm
0.249 ft
2.984 in
75.2 mm
7.52 cm
0.247 ft
2.961 in
Height160.94 mm
16.094 cm
0.528 ft
6.336 in
155.4 mm
15.54 cm
0.51 ft
6.118 in
158.7 mm
15.87 cm
0.521 ft
6.248 in
Thickness8.13 mm
0.813 cm
0.027 ft
0.32 in
7.3 mm
0.73 cm
0.024 ft
0.287 in
8.6 mm
0.86 cm
0.028 ft
0.339 in
Weight190 g
0.42 lbs
6.7 oz
168 g
0.37 lbs
5.93 oz
182 g
0.4 lbs
6.42 oz
Volume97.4 cm³
5.92 in³
85.99 cm³
5.22 in³
102.63 cm³
6.23 in³
ColorsFrosted Silver
Glacier Blue
Gold
Black
Rose-gold
Red
Star Map Blue
Silver Wing White
Body materialsAluminium alloy
Matte-Frosted Glass
MetalAluminium alloy
Glass

SIM card

The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.

SIM card typeNano-SIMNano-SIM / microSD
Nano-SIM
Nano-SIM
Number of SIM cards222
FeaturesDual SIM stand-by (Both cards are active. When one is busy, the other is not active)-Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSMGSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
CDMACDMA 800 MHz
CDMA 1900 MHz
-CDMA 800 MHz (BC0)
W-CDMA--W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 1700 MHz (B4)
W-CDMA 2100 MHz (B1)
TD-SCDMATD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
-TD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
UMTSUMTS 850 MHz
UMTS 900 MHz
UMTS 1700/2100 MHz
UMTS 1900 MHz
UMTS 2100 MHz
UMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
-
LTELTE-TDD 1900 MHz (B39)
LTE-TDD 2000 MHz (B34)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE 700 MHz Class 13
LTE 700 MHz Class 17
LTE 800 MHz
LTE 850 MHz
LTE 900 MHz
LTE 1700/2100 MHz
LTE 1800 MHz
LTE 1900 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE 700 MHz (B12)
LTE 800 MHz (B18)
LTE 800 MHz (B19)
LTE 1900 MHz (B25)
LTE 850 MHz (B26)
LTE 700 MHz (B28)
LTE 700 MHz (B29)
LTE 2300 MHz (B30)
LTE 1500 MHz (B32)
LTE 1700/2100 MHz (B66)
LTE 600 MHz (B71)
LTE 800 MHz
LTE 850 MHz
LTE 900 MHz
LTE 1800 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE-TDD 1900 MHz (B39)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1700 MHz (B4)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-TDD 1900 MHz (B39)
LTE-TDD 2000 MHz (B34)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)

Mobile network technologies and bandwidth

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologiesUMTS
EDGE
GPRS
HSPA+
LTE Cat 16
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
UMTS
EDGE
GPRS
HSPA+
LTE Cat 6
UMTS
EDGE
GPRS
HSPA+
LTE Cat 13/Cat 15
--4x4 MIMO

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS)OxygenOS 10 (Android 10)Android 7.1.2 Nougat
Android 8.0 Oreo
Android 8.1 Oreo
Android 9.0 Pie
ColorOS 6.1 (Android 9.0 Pie)

System on Chip (SoC)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoCQualcomm Snapdragon 855 PlusQualcomm Snapdragon 625 MSM8953Qualcomm Snapdragon 730G
Process technology7 nm14 nm8 nm
CPU1x 2.96 GHz Kryo 485, 3x 2.42 GHz Kryo 485, 4x 1.8 GHz Kryo 485ARM Cortex-A532x 2.2 GHz Kryo 470, 6x 1.8 GHz Kryo 470
CPU bits64 bit64 bit64 bit
Instruction setARMv8-AARMv8ARMv8
CPU cores888
CPU frequency2960 MHz2000 MHz2200 MHz
GPUQualcomm Adreno 640Qualcomm Adreno 506Qualcomm Adreno 618
GPU frequency-650 MHz-
RAM capacity8 GB4 GB6 GB
8 GB
RAM typeLPDDR4XLPDDR3LPDDR4X
RAM channelsDouble channelSingle channelDouble channel
RAM frequency2133 MHz933 MHz1866 MHz
--GameBoost 2.0
Touch Boost 2.0
Frame Boost 2.0

Storage

Every mobile device has a built-in storage (internal memory) with a fixed capacity.

Storage128 GB
256 GB
64 GB64 GB
128 GB
256 GB
UFS 3.0-UFS 2.1

Memory cards

Memory cards are used in mobile devices for expanding their external storage capacity.

Types-microSD
microSDHC
microSDXC
microSD
microSDHC
microSDXC

Display

The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.

Type/technologyFluid AMOLEDIPSSuper AMOLED
Diagonal size6.55 in
166.37 mm
16.64 cm
5.5 in
139.7 mm
13.97 cm
6.4 in
162.56 mm
16.26 cm
Width2.69 in
68.27 mm
6.83 cm
2.7 in
68.49 mm
6.85 cm
2.68 in
68.12 mm
6.81 cm
Height5.97 in
151.72 mm
15.17 cm
4.79 in
121.76 mm
12.18 cm
5.81 in
147.6 mm
14.76 cm
Aspect ratio2.222:11.778:1
16:9
2.167:1
Resolution1080 x 2400 pixels1080 x 1920 pixels1080 x 2340 pixels
Pixel density402 ppi
158 ppcm
401 ppi
157 ppcm
403 ppi
158 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
-
Display area86.74 %71.02 %84.52 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Capacitive
Multi-touch
Scratch resistant
Corning Gorilla Glass 6
90 Hz refresh rate
Peak brightness - 1000 cd/m²
DCI-P3
HDR10+
Display manufacturer - Tianma
Corning Gorilla Glass 3
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
1000:1 contrast ratio
450 cd/m²
Corning Gorilla Glass 5
COF bonding technology
515 cd/m² brightness

Sensors

Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.

SensorsProximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Hall
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Hall
Proximity
Light
Accelerometer
Gyroscope
Geomagnetic
Fingerprint
Fingerprint sensor model - Goodix (In-display optical fingerprint sensor)
Step detector
Step counter
Fingerprint sensor model - Fingerprint Cards FPC1035Fingerprint sensor model - Goodix 3.0 (In-display optical fingerprint sensor)

Rear camera

The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor modelSony IMX586 Exmor RSOmniVision OV12A10Samsung S5KGW1
Sensor typeCMOS BSIPureCelISOCELL
Sensor size-5.11 x 3.84 mm
0.25 in
-
Sensor format1/2"-1/1.72"
Pixel size0.8 µm
0.000800 mm
1.277 µm
0.001277 mm
0.8 µm
0.000800 mm
Crop factor-6.77-
ISO100 - 3200100 - 3200-
Aperturef/1.6f/2.2f/1.8
Focal length and 35 mm equivalent4.75 mm
27 mm *(35 mm / full frame)
3.81 mm
25.81 mm *(35 mm / full frame)
-
Number of lenses756
Flash typeDual LEDDual LEDDual LED
Image resolution8000 x 6000 pixels
48 MP
4000 x 3000 pixels
12 MP
9280 x 6944 pixels
64.44 MP
Video resolution3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
Video FPS60 fps30 fps30 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Digital image stabilization
Optical image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
RAW
Phase detection autofocus (PDAF)
Autofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
Autofocus
Continuous shooting
Digital zoom
Digital image stabilization
Optical image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Macro mode
Phase detection autofocus (PDAF)
Pixel size - 1.6 μm (4-in-1 pixel binning)
1080p @ 240 fps
720p @ 480 fps
Secondary rear camera - 12MP (telephoto)
Pixel size - 1.0 μm (#2)
Aperture size - f/2.2 (#2)
2x optical zoom (#2)
6-element lens (#2)
Third rear camera - 16MP (ultra-wide)
Angle of view - 117° (#3)
6-element lens (#3)
Sensor type - PureCel Plus
720p @ 120 fps
Secondary rear camera - 12 MP (telephoto)
Sensor model - OmniVision OV13880 (#2)
Pixel size - 1.0 μm (#2)
Aperture size - f/2.6 (#2)
5-element lens (#2)
Focal length (35 mm equivalent) - 50 mm (#2)
Pixel size - 1.6 μm (4-in-1 pixel binning)
Sensor type - ISOCELL PLUS
Super Phase Detection
Secondary rear camera - 8 MP (ultra-wide)
Pixel size - 1.12 μm (#2)
Aperture size - f/2.25 (#2)
Angle of view - 119° (#2)
5-element lens (#2)
Third rear camera - 2MP (depth-sensing)
Sensor size - 1/5" (#3)
Pixel size - 1.75 μm (#3)
Aperture size - f/2.4 (#3)
Fourth rear camera - 2MP (macro)
Sensor size - 1/5" (#4)
Pixel size - 1.75 μm (#4)
Aperture size - f/2.4 (#4)

Front camera

Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.

Sensor modelSony IMX471 Exmor RSSamsung S5K5E8Samsung S5KGD1
Sensor typeCMOSCMOS BSIISOCELL
Sensor size-2.9 x 2.15 mm
0.14 in
-
Pixel size1 µm
0.001000 mm
1.119 µm
0.001119 mm
0.8 µm
0.000800 mm
Crop factor-11.99-
Aperturef/2f/2-
Focal length and 35 mm equivalent3.56 mm
21 mm *(35 mm / full frame)
3 mm
35.96 mm *(35 mm / full frame)
-
Number of lenses--5
Image resolution4608 x 3456 pixels
15.93 MP
2592 x 1944 pixels
5.04 MP
6528 x 4896 pixels
31.96 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
Video FPS30 fps30 fps30 fps
FeaturesFace unlock-Face unlock
Digital image stabilization-Sensor type - ISOCELL PLUS
Pixel size - 1.6 μm (4-in-1 pixel binning)

Audio

Information about the type of speakers and the audio technologies supported by the device.

SpeakerLoudspeaker
Earpiece
Stereo speakers
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Dolby Atmos
Headphone adapter
Dirac HD Sound
DHS Audio Calibration Algorithm
Dolby Atmos
Superlinear speaker
Smart PA

Radio

The radio in a mobile device is a built-in FM radio receiver.

RadioNoYesYes

Tracking/Positioning

Information about the positioning and navigation technologies supported by the device.

Tracking/PositioningA-GPS
GPS (L1+L5)
GLONASS (L1)
BeiDou (B1)
Galileo (E1+E5a)
GPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS

Wi-Fi

Wi-Fi is a technology that provides wireless data connections between various devices within a short range.

Wi-Fi802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
2x2 MiMO-2x2 MiMO
256 QAM

Bluetooth

Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.

Version5.04.25.0
FeaturesA2DPA2DP
HID
A2DP
LE

USB

The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.

Connector typeUSB Type-CUSB Type-CUSB Type-C
Version3.12.02.0
FeaturesCharging
Mass storage
On-The-Go
Charging
Host
Mass storage
On-The-Go
Charging
Mass storage
On-The-Go

Headphone jack

The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.

Headphone jackNoYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Tethering
DLNA
NFC
VoLTE
Computer sync
OTA sync
Infrared
Tethering
VoLTE
Computer sync
OTA sync
Tethering
NFC
VoLTE

Browser

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

BrowserHTML
HTML5
CSS 3
HTML
HTML5
CSS 3
HTML
HTML5
CSS 3

Audio file formats/codecs

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecsAAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AC3
AMR
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV

Video file formats/codecs

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs3GPP
AVI
DivX
H.263
H.264
H.265
MKV
QuickTime
MP4
WebM
WMV
Xvid
3GPP
AVI
H.263
H.264
MKV
MP4
VC-1
VP8
Xvid
3GPP
AVI
DivX
Flash Video
H.263
H.264
MKV
MP4
WebM
WMV
Xvid

Battery

The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.

Capacity3800 mAh3080 mAh4000 mAh
TypeLi-PolymerLi-PolymerLi-Polymer
Charger output power5 V / 6 A5 V / 2 A-
Quick charge technologyWARP Charge 30T-VOOC 4.0
FeaturesFast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable
-Battery model: BN3130W fast charging

Specific Absorption Rate (SAR)

The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.

Head SAR (EU)1.04 W/kg1.75 W/kg-
Body SAR (EU)1.4 W/kg0.76 W/kg-
Head SAR (USA)1.07 W/kg1.26 W/kg-
Body SAR (USA)1.1 W/kg0.17 W/kg-

Additional features

Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.

Additional featuresSAR (Specific Absorption Rate) India: head - 1.06 W/kg; body - 0.93 W/kg--
 OnePlus 7TXiaomi Mi A1Realme X2