Comparison between:
- KXD A9
- HTC Wildfire X
- Cubot X20 Pro
- Xiaomi Redmi 8

Brand and model

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

KXD A9HTC Wildfire XCubot X20 ProXiaomi Redmi 8
KXD A9HTC Wildfire X
Prices
Cubot X20 Pro
Prices
Xiaomi Redmi 8
Prices
Model alias---Redmi8
Red Rice 8
Red Rice8
M1908C3IC
MZB8257IN; M1908C3II

Design

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

Width-74.94 mm
7.49 cm
0.25 ft
2.95 in
74.6 mm
7.46 cm
0.24 ft
2.94 in
75.41 mm
7.54 cm
0.25 ft
2.97 in
Height-156.7 mm
15.67 cm
0.51 ft
6.17 in
157.1 mm
15.71 cm
0.52 ft
6.19 in
156.48 mm
15.65 cm
0.51 ft
6.16 in
Thickness-7.95 mm
0.8 cm
0.03 ft
0.31 in
8.1 mm
0.81 cm
0.03 ft
0.32 in
9.4 mm
0.94 cm
0.03 ft
0.37 in
Weight-160 g
0.35 lbs
5.64 oz
230 g
0.51 lbs
8.11 oz
188 g
0.41 lbs
6.63 oz
Volume-93.36 cm³
5.67 in³
94.93 cm³
5.76 in³
110.92 cm³
6.74 in³
ColorsBlue
Red
Black
Blue
Black
Blue
Gold
Onyx Black
Ruby Red
Sapphire Blue
Body materialsPlasticPlasticAluminium alloy
Glass
Plastic

SIM card

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

SIM card typeNano-SIM
Nano-SIM / microSD
Nano-SIM / microSD
Nano-SIM
Nano-SIM / microSD
Nano-SIM
Nano-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 (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
CDMA---CDMA 800 MHz (BC0)
CDMA 1900 MHz (BC1)
W-CDMAW-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 2100 MHz (B1)
W-CDMA 900 MHz (B8)
W-CDMA 2100 MHz (B1)
W-CDMA 900 MHz (B19)
W-CDMA 2100 MHz (B1)
W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 1900 MHz (B2)
W-CDMA 2100 MHz (B1)
TD-SCDMA---TD-SCDMA 2000 MHz
LTELTE-FDD 800 MHz (B20)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-TDD 2300 MHz (B40)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-FDD 800 MHz (B20)
LTE-FDD 850 MHz (B19)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)

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 technologiesEDGE
GPRS
HSPA+
LTE Cat 4
UMTS
EDGE
GPRS
HSPA
LTE Cat 4
UMTS
EDGE
GPRS
HSPA+
LTE Cat 7
UMTS
EDGE
GPRS
HSPA+
LTE

Operating system

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

Operating system (OS)Android 9.0 PieAndroid 9.0 PieAndroid 9.0 PieMIUI 10 (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.

SoCMediaTek MT6739MediaTek Helio P22 (MT6762)MediaTek Helio P60 (MT6771)Qualcomm Snapdragon 439
Process technology28 nm12 nm12 nm12 nm
CPUARM Cortex-A534x 2.0 GHz ARM Cortex-A53, 4x 1.5 GHz ARM Cortex-A534x 2.0 GHz ARM Cortex-A73, 4x 2.0 GHz ARM Cortex-A534x 1.95 GHz ARM Cortex-A53, 4x 1.45 GHz ARM Cortex-A53
CPU bits64 bit64 bit64 bit64 bit
Instruction setARMv8-AARMv8-AARMv8-AARMv8
CPU cores4888
CPU frequency1500 MHz2000 MHz2000 MHz1950 MHz
GPUPowerVR GE8100PowerVR GE8320ARM Mali-G72 MP3Qualcomm Adreno 505
GPU cores--3-
GPU frequency570 MHz-800 MHz650 MHz
RAM capacity2 GB3 GB
4 GB
6 GB3 GB
4 GB
RAM typeLPDDR3--LPDDR3
RAM channelsSingle channel--Single channel
RAM frequency---933 MHz

Storage

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

Storage16 GB32 GB
128 GB
128 GB32 GB
64 GB
-eMMC 5.1eMMC 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
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/technologyIPSIPSIPSIPS
Diagonal size6.22 in
157.99 mm
15.8 cm
6.22 in
157.99 mm
15.8 cm
6.3 in
160.02 mm
16 cm
6.22 in
157.99 mm
15.8 cm
Width2.65 in
67.34 mm
6.73 cm
2.66 in
67.63 mm
6.76 cm
2.64 in
67.06 mm
6.71 cm
2.66 in
67.63 mm
6.76 cm
Height5.63 in
142.92 mm
14.29 cm
5.62 in
142.78 mm
14.28 cm
5.72 in
145.29 mm
14.53 cm
5.62 in
142.78 mm
14.28 cm
Aspect ratio2.122:12.111:12.167:12.111:1
Resolution720 x 1528 pixels720 x 1520 pixels1080 x 2340 pixels720 x 1520 pixels
Pixel density272 ppi
106 ppcm
270 ppi
106 ppcm
409 ppi
160 ppcm
270 ppi
106 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area-82.5 %83.4 %82.1 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
In-cell-In-cell
2.5D curved glass screen
90% NTSC
1300:1 contrast
450 cd/m² brightness
In-cell
2.5D curved glass screen
Corning Gorilla Glass 5
1500:1
70.8% NTSC

Sensors

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

SensorsProximity
Accelerometer
Compass
Proximity
Light
Accelerometer
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Proximity
Light
Accelerometer
Compass
Fingerprint

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 model--Sony IMX486 Exmor RSSony IMX363 Exmor RS
Sensor type--CMOSCMOS
Sensor size--6.42 x 4.76 mm
0.31 in
-
Sensor format--1/2.9"1/2.55"
Pixel size-1.25 µm
0.001250 mm
1.25 µm
0.001250 mm
1.4 µm
0.001400 mm
Crop factor--5.42-
ISO--100 - 1600-
Aperturef/2--f/1.8
Number of lenses4--6
Flash typeLEDDual LEDDual LEDDual LED
Image resolution3264 x 2448 pixels
7.99 MP
-3968 x 2976 pixels
11.81 MP
4032 x 3024 pixels
12.19 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 fps60 fps
FeaturesAutofocus
Panorama
Touch focus
Autofocus
Digital zoom
Optical zoom
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
Phase detection autofocus (PDAF)
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
Phase detection autofocus (PDAF)
Secondary rear camera - 0.3MPSecondary rear camera - 5MP (depth)
Third rear camera - 8MP (telephoto)
2x optical zoom (#3)
8x hybrid zoom (#3)
Flash - 1A
Secondary rear camera - 20MP Sony IMX350 Exmor RS (depth)
Sensor size - 1/2.78" (#2)
Pixel size - 1.00 μm (#2)
Third rear camera - 8MP
Angle of view - 125° (#3)
Phase detection with Dual Pixel
Secondary rear camera - 2 MP (depth-sensing)

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 model--Sony IMX214 Exmor RS-
Sensor type--CMOS-
Sensor size--4.69 x 3.52 mm
0.23 in
-
Pixel size--1.127 µm
0.001127 mm
1.12 µm
0.001120 mm
Crop factor--7.38-
Aperturef/2-f/2f/2
Number of lenses4---
Image resolution2560 x 1920 pixels
4.92 MP
3264 x 2448 pixels
7.99 MP
4160 x 3120 pixels
12.98 MP
3264 x 2448 pixels
7.99 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 fps-30 fps30 fps
FeaturesFace unlockFace unlockFace unlockFace unlock
-Screen flash--

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
---Smart PA

Radio

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

RadioYesYesYesYes

Tracking/Positioning

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

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

Wi-Fi

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

Wi-Fi802.11b
802.11g
802.11n
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
802.11b
802.11g
802.11n
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11b
802.11g
802.11n
Wi-Fi Hotspot
Wi-Fi Direct

Bluetooth

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

Version4.04.14.24.2
FeaturesA2DPA2DPA2DPA2DP
LE

USB

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

Connector typeMicro USBUSB Type-CUSB Type-CUSB Type-C
Version2.02.02.02.0
FeaturesCharging
Mass storage
Charging
Mass storage
Charging
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 jackYesYesNoYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
VoLTE
Computer sync
Tethering
VoLTE
Computer sync
Tethering
VoLTE
Computer sync
OTA sync
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/codecseAAC+
MP3
WAV
AAC
AC3
AMR
eAAC+
MIDI
MP3
OGG
WMA
WAV
AAC
AMR
FLAC
MP3
OGG
WAV
APE
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/codecsH.264
MP4
3GPP
AVI
H.264
MKV
MP4
WMV
Xvid
3GPP
AVI
H.264
MP4
Xvid
MOV
3GPP
AVI
DivX
H.263
H.264
H.265
MKV
MP4
VC-1
Xvid

Battery

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

Capacity3000 mAh3300 mAh4000 mAh5000 mAh
TypeLi-IonLi-IonLi-IonLi-Polymer
2G talk time18 h
1080 min
0.8 days
-28 h
1680 min
1.2 days
-
2G stand-by time264 h
15840 min
11 days
-347 h
20820 min
14.5 days
-
3G talk time18 h
1080 min
0.8 days
-28 h
1680 min
1.2 days
-
3G stand-by time264 h
15840 min
11 days
-347 h
20820 min
14.5 days
-
Charger output power--5 V / 2 A5 V / 2 A
9 V / 2 A
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)---0.231 W/kg
Body SAR (EU)---1.48 W/kg
Head SAR (USA)---0.478 W/kg
Body SAR (USA)---1.074 W/kg

Additional features

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

Additional features-SAR (Specific Absorption Rate) India: <1.6W/Kg-M1908C3II - SAR (Specific Absorption Rate) India: head - 0.339 W/kg; body - 1.000 W/kg
P2i nano-coating
 KXD A9HTC Wildfire XCubot X20 ProXiaomi Redmi 8