Comparison between:
- Xiaomi Redmi 6 Pro
- Xiaomi Redmi S2
- Xiaomi Mi A2
- Xiaomi Mi 6X

Brand and model

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

Xiaomi Redmi 6 ProXiaomi Redmi S2Xiaomi Mi A2Xiaomi Mi 6X
Xiaomi Redmi 6 Pro
Prices
Xiaomi Redmi S2
Prices
Xiaomi Mi A2
Prices
Xiaomi Mi 6X
Prices
Model aliasRedmi 6Pro---

Design

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

Width71.68 mm
7.17 cm
0.24 ft
2.82 in
77.26 mm
7.73 cm
0.25 ft
3.04 in
75.4 mm
7.54 cm
0.25 ft
2.97 in
75.4 mm
7.54 cm
0.25 ft
2.97 in
Height149.33 mm
14.93 cm
0.49 ft
5.88 in
160.73 mm
16.07 cm
0.53 ft
6.33 in
158.7 mm
15.87 cm
0.52 ft
6.25 in
158.7 mm
15.87 cm
0.52 ft
6.25 in
Thickness8.75 mm
0.88 cm
0.03 ft
0.34 in
8.1 mm
0.81 cm
0.03 ft
0.32 in
7.3 mm
0.73 cm
0.02 ft
0.29 in
7.3 mm
0.73 cm
0.02 ft
0.29 in
Weight178 g
0.39 lbs
6.28 oz
170 g
0.37 lbs
6 oz
168 g
0.37 lbs
5.93 oz
168 g
0.37 lbs
5.93 oz
Volume93.66 cm³
5.69 in³
100.59 cm³
6.11 in³
87.35 cm³
5.3 in³
87.35 cm³
5.3 in³
ColorsGold
Rose-gold
Blue
Red
Black
Gold
Silver
Rose-gold
Black
Blue
Gold
Black
Red
Blue
Gold
Rose-gold
Body materialsMetalPlasticAluminium alloyAluminium alloy

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-SIMNano-SIMNano-SIM
Number of SIM cards2222
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)Dual 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
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
CDMACDMA 800 MHzCDMA 800 MHz-CDMA 800 MHz
TD-SCDMATD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
TD-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 1900 MHz
UMTS 2100 MHz
UMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
UMTS 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 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 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 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-TDD 2300 MHz (B40)
LTE-TDD 2600 MHz (B38)
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)

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 6
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
UMTS
EDGE
GPRS
HSPA+
LTE Cat 6
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
UMTS
EDGE
GPRS
HSPA+
LTE Cat 12
UMTS
EDGE
GPRS
HSPA+
LTE Cat 12
EV-DO Rev. A
TD-SCDMA
TD-HSDPA

Operating system

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

Operating system (OS)MIUI V9.6 (Android 8.1 Oreo)MIUI V9.5 (Android 8.1 Oreo)
MIUI (Android 9.0 Pie)
Android 8.1 Oreo
Android 9.0 Pie
MIUI V9.5 (Android 8.1 Oreo)

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 625 MSM8953Qualcomm Snapdragon 625 MSM8953Qualcomm Snapdragon 660 MSM8976 PlusQualcomm Snapdragon 660 MSM8976 Plus
Process technology14 nm14 nm14 nm14 nm
CPUARM Cortex-A53ARM Cortex-A534x 2.2 GHz Kryo 260, 4x 1.84 GHz Kryo 2604x 2.2 GHz Kryo 260, 4x 1.84 GHz Kryo 260
CPU bits64 bit64 bit64 bit64 bit
Instruction setARMv8ARMv8ARMv8ARMv8
CPU cores8888
CPU frequency2000 MHz2000 MHz2200 MHz2200 MHz
GPUQualcomm Adreno 506Qualcomm Adreno 506Qualcomm Adreno 512Qualcomm Adreno 512
GPU frequency650 MHz650 MHz650 MHz650 MHz
RAM capacity3 GB
4 GB
3 GB
4 GB
4 GB
6 GB
4 GB
6 GB
RAM typeLPDDR3LPDDR3LPDDR4XLPDDR4X
RAM channelsSingle channelSingle channelDouble channelDouble channel
RAM frequency933 MHz933 MHz1866 MHz1866 MHz

Storage

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

Storage32 GB
64 GB
32 GB
64 GB
32 GB
64 GB
128 GB
32 GB
64 GB
128 GB
--eMMC 5.1eMMC 5.1

Memory cards

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

TypesmicroSD
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/technologyIPSIPSIPSIPS
Diagonal size5.84 in
148.34 mm
14.83 cm
5.99 in
152.15 mm
15.21 cm
5.99 in
152.15 mm
15.21 cm
5.99 in
152.15 mm
15.21 cm
Width2.5 in
63.5 mm
6.35 cm
2.68 in
68.04 mm
6.8 cm
2.68 in
68.04 mm
6.8 cm
2.68 in
68.04 mm
6.8 cm
Height5.28 in
134.06 mm
13.41 cm
5.36 in
136.08 mm
13.61 cm
5.36 in
136.08 mm
13.61 cm
5.36 in
136.08 mm
13.61 cm
Aspect ratio2.111:12:1
2:1 (18:9)
2:1
2:1 (18:9)
2:1
2:1 (18:9)
Resolution1080 x 2280 pixels720 x 1440 pixels1080 x 2160 pixels1080 x 2160 pixels
Pixel density432 ppi
169 ppcm
269 ppi
105 ppcm
403 ppi
158 ppcm
403 ppi
158 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area79.79 %74.8 %77.63 %77.63 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
2.5D curved glass screen
1500:1 contrast ratio
84% NTSC
1000:1 contrast ratio
450 cd/m²
70.8 % NTSC
Corning Gorilla Glass 5
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
1500:1 contrast ratio
500 cd/m²
85% NTSC
Display manufacturer - Tianma
Corning Gorilla Glass 3
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
500 cd/m²
84% NTSC

Sensors

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

SensorsProximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Barometer
Fingerprint
Hall
Proximity
Light
Accelerometer
Compass
Gyroscope
Barometer
Fingerprint
Hall
Fingerprint sensor model - Fingerprint Cards FPC1028; GoodixFingerprint sensor model - Fingerprint Cards FPC1028Fingerprint sensor model - Fingerprint Cards FPC1028Fingerprint sensor model - Fingerprint Cards FPC1028

Primary camera

The primary camera of the mobile device is usually placed at its back and is used for taking photos and recording videos.

Sensor modelSony IMX486 Exmor RSSony IMX486 Exmor RSSony IMX486 Exmor RSSony IMX486 Exmor RS
Sensor typeCMOSCMOSCMOSCMOS
ISO-100 - 3200--
Aperturef/2.2f/2.2f/1.75f/1.75
Focal length-3.84 mm4.07 mm4.07 mm
Flash typeLEDLEDDual LEDDual LED
Image resolution4000 x 3000 pixels
12 MP
4000 x 3000 pixels
12 MP
4000 x 3000 pixels
12 MP
4000 x 3000 pixels
12 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
Video FPS30 fps30 fps30 fps30 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Autofocus
Continuous shooting
Digital zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Autofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Autofocus
Continuous shooting
Digital zoom
Optical zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Sensor size - 1/2.9"
Pixel size - 1.25 μm
Phase detection
5-element lens
720p @ 120 fps
Secondary rear camera - 5 MP
Sensor model - Samsung S5K5E8 (#2)
Sensor type - CMOS BSI (#2)
Sensor size - 2.9 x 2.15 mm (#2)
Pixel size - 1.12 μm (#2)
Aperture size - f/2.2 (#2)
Sensor size - 1/2.9"
Pixel size - 1.25 μm
Phase detection
5-element lens
Secondary rear camera - 5 MP
Sensor model - Samsung S5K5E8 (#2)
Sensor type - CMOS BSI (#2)
Sensor size - 2.9 x 2.15 mm (#2)
Pixel size - 1.12 μm (#2)
Sensor size - 1/2.9"
Pixel size - 1.25 μm
Phase detection
720p @ 120 fps
Secondary rear camera - 20 MP
Sensor model - Sony IMX376 Exmor RS (#2)
Sensor type - CMOS BSI (#2)
Sensor size - 1/2.78" (#2)
Pixel size - 2.0 μm (4-in-1 pixel binning) (#2)
Aperture size - f/1.75 (#2)
Sensor size - 1/2.9"
Pixel size - 1.25 μm
Phase detection
720p @ 120 fps
Secondary rear camera - 20 MP (telephoto)
Sensor model - Sony IMX376 Exmor RS (#2)
Sensor type - CMOS BSI (#2)
Sensor size - 1/2.78" (#2)
Pixel size - 2.0 μm (4-in-1 pixel binning) (#2)
Aperture size - f/1.75 (#2)

Secondary camera

Secondary cameras are placed above the screen of the device and are usually used for video calls, gesture recognition, etc.

Sensor modelOmniVision OV5675Samsung S5K3P8SPSony IMX376 Exmor RSSony IMX376 Exmor RS
Sensor typePureCelISOCELLCMOS BSICMOS BSI
Sensor size2.98 x 2.21 mm
0.15 in
---
Pixel size1.151 µm
0.001151 mm
---
Crop factor11.66---
Aperturef/2f/2f/2.2f/2
Focal length-3.52 mm3.82 mm3.82 mm
Flash type-LEDLEDLED
Image resolution2592 x 1944 pixels
5.04 MP
4608 x 3456 pixels
15.93 MP
5184 x 3880 pixels
20.11 MP
5384 x 3752 pixels
20.2 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
Video FPS30 fps30 fps30 fps30 fps
Face unlockSensor size - 1/3.1"
Pixel size - 1.0 μm
Face unlock
Sensor size - 1/2.78"
Pixel size - 2.0 μm (4-in-1 pixel binning)
HDR
Sensor size - 1/2.78"
Pixel size - 2.0 μm (4-in-1 pixel binning)
Face unlock
HDR

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
--Headphone adapterHeadphone adapter

Radio

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

RadioYesYesNo-

Tracking/Positioning

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

Tracking/PositioningGPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
BeiDou

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
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11b
802.11g
802.11n
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
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 MiMO2x2 MiMO

Bluetooth

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

Version4.24.25.05.0
FeaturesA2DP
HID
A2DP
HID
A2DP
HID
A2DP
HID

USB

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

Connector typeMicro USBMicro USBUSB Type-CUSB Type-C
Version2.02.02.02.0
FeaturesCharging
Host
Mass storage
On-The-Go
Charging
Host
Mass storage
On-The-Go
Charging
Host
Mass storage
On-The-Go
Charging
Host
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 jackYesYesNoNo

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Infrared
Tethering
VoLTE
Computer sync
OTA sync
Infrared
Tethering
VoLTE
Computer sync
OTA sync
Infrared
Tethering
VoLTE
Computer sync
OTA sync
Infrared
Tethering
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
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+
AC3
AMR
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AC3
AMR
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AC3
AMR
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AC3
AMR
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
H.263
H.264
MKV
MP4
VC-1
VP8
Xvid
3GPP
AVI
H.263
H.264
MKV
MP4
VC-1
VP8
Xvid
3GPP
AVI
H.263
H.264
H.265
MKV
MP4
VC-1
VP8
Xvid
3GPP
AVI
H.263
H.264
H.265
MKV
MP4
VC-1
VP8
Xvid

Battery

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

Capacity4000 mAh3080 mAh3010 mAh3030 mAh
TypeLi-PolymerLi-PolymerLi-PolymerLi-Polymer
Charger output power5 V / 2 A5 V / 2 A5 V / 2 A5 V / 3 A
9 V / 2 A
12 V / 1.5 A
Quick charge technology--Qualcomm Quick Charge 3.0Qualcomm Quick Charge 3.0
FeaturesNon-removableNon-removableFast charging
Non-removable
Fast charging
Non-removable

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)-0.429 W/kg0.963 W/kg-
Body SAR (EU)-1.577 W/kg0.639 W/kg-
Head SAR (USA)0.964 W/kg0.89 W/kg1.16 W/kg-
Body SAR (USA)0.78 W/kg1.43 W/kg0.66 W/kg-

Additional features

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

Additional featuresM1805D1SI - SAR (Specific Absorption Rate) India: head - 0.964 W/kg; body - 0.780 W/kg-M1804D2SI - SAR (Specific Absorption Rate) India: head - 1.092 W/kg; body - 0.259 W/kg-
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