Comparison between:
- Oukitel K9
- Xiaomi Redmi 7
- Oppo A7n

Brand and model

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

Oukitel K9Xiaomi Redmi 7Oppo A7n
Oukitel K9
Prices
Xiaomi Redmi 7
Prices
Oppo A7n
Model alias-Redmi7
Red Rice 7
Red Rice7
-

Design

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

Width86.3 mm
8.63 cm
0.28 ft
3.4 in
75.58 mm
7.56 cm
0.25 ft
2.98 in
75.4 mm
7.54 cm
0.25 ft
2.97 in
Height177.6 mm
17.76 cm
0.58 ft
6.99 in
158.73 mm
15.87 cm
0.52 ft
6.25 in
155.9 mm
15.59 cm
0.51 ft
6.14 in
Thickness8.9 mm
0.89 cm
0.03 ft
0.35 in
8.47 mm
0.85 cm
0.03 ft
0.33 in
8.2 mm
0.82 cm
0.03 ft
0.32 in
Weight232 g
0.51 lbs
8.19 oz
180 g
0.4 lbs
6.35 oz
170 g
0.37 lbs
6 oz
Volume136.41 cm³
8.28 in³
101.61 cm³
6.17 in³
96.39 cm³
5.85 in³
ColorsBlack
Blue
Red
Black
Blue
Black
Green
Body materialsPlasticPlasticAluminium 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-SIM
Nano-SIM / microSD
Nano-SIMNano-SIM
Number of SIM cards222
Features-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
CDMA-CDMA 800 MHzCDMA 800 MHz
W-CDMAW-CDMA 850 MHz
W-CDMA 900 MHz
W-CDMA 1700 MHz
W-CDMA 1900 MHz
W-CDMA 2100 MHz
W-CDMA 850 MHz
W-CDMA 900 MHz
W-CDMA 1900 MHz
W-CDMA 2100 MHz
-
TD-SCDMA-TD-SCDMA 1900 MHz
TD-SCDMA 2000 MHz
TD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
UMTS--UMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
LTELTE 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-TDD 2300 MHz (B40)
LTE 700 MHz (B12)
LTE 800 MHz (B19)
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-TDD 2000 MHz (B34)
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-TDD 2000 MHz (B34)

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
UMTS
EDGE
GPRS
HSPA+
LTE
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
UMTS
EDGE
GPRS
HSPA+
LTE Cat 7
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)Android 9.0 PieMIUI V10 (Android 9.0 Pie)ColorOS 5.2.1 (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.

SoCMediaTek Helio P35 (MT6765)Qualcomm Snapdragon 632MediaTek Helio P35 (MT6765)
Process technology12 nm14 nm12 nm
CPU4x 2.3 GHz ARM Cortex-A53, 4x 1.8 GHz ARM Cortex-A534x 1.8 GHz Kryo 250, 4x 1.8 GHz Kryo 2504x 2.3 GHz ARM Cortex-A53, 4x 1.8 GHz ARM Cortex-A53
CPU bits64 bit64 bit64 bit
Instruction setARMv8-AARMv8ARMv8-A
CPU cores888
CPU frequency2300 MHz1800 MHz2300 MHz
GPUPowerVR GE8320Qualcomm Adreno 506PowerVR GE8320
GPU frequency680 MHz-680 MHz
RAM capacity4 GB2 GB
3 GB
4 GB
4 GB
RAM typeLPDDR4XLPDDR3LPDDR3
RAM channelsDouble channelSingle channelSingle channel
RAM frequency1600 MHz-933 MHz

Storage

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

Storage64 GB16 GB
32 GB
64 GB
64 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
microSD
microSDHC
microSDXC

Display

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

Type/technologyIPSIPSIPS
Diagonal size7.12 in
180.85 mm
18.08 cm
6.26 in
159 mm
15.9 cm
6.2 in
157.48 mm
15.75 cm
Width3.09 in
78.43 mm
7.84 cm
2.68 in
68.07 mm
6.81 cm
2.65 in
67.42 mm
6.74 cm
Height6.42 in
162.96 mm
16.3 cm
5.66 in
143.7 mm
14.37 cm
5.6 in
142.32 mm
14.23 cm
Aspect ratio2.078:12.111:12.111:1
Resolution1080 x 2244 pixels720 x 1520 pixels720 x 1520 pixels
Pixel density350 ppi
137 ppcm
269 ppi
105 ppcm
271 ppi
106 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area83.66 %81.79 %81.89 %
Other featuresCapacitive
Multi-touch
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Display manufacturer - AU Optronics
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
1000:1 contrast ratio
500 cd/m²
Corning Gorilla Glass 5
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
1500:1 contrast ratio
84% NTSC
2.5D curved glass screen

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
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope

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 IMX298 Exmor RS--
Sensor typeCMOSCMOSCMOS
Sensor size5.22 x 3.92 mm
0.26 in
--
Pixel size1.132 µm
0.001132 mm
--
Crop factor6.63--
ISO100 - 1600-100 - 1600
Aperturef/1.8f/2.2f/2.2
Focal length3.8 mm
25.21 mm *(35 mm / full frame)
--
Flash typeDual LEDDual LEDLED
Image resolution4608 x 3456 pixels
15.93 MP
4032 x 3024 pixels
12.19 MP
4160 x 3120 pixels
12.98 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 fps60 fps30 fps
FeaturesAutofocus
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
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
RAW
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
Secondary rear camera - 2 MP
Sensor model - GalaxyCore GC2035 (#2)
Sensor size - 2.8 x 2.1 mm (#2)
Pixel size - 1.25 μm
Phase detection
720p @ 120 fps
Secondary rear camera - 2 MP
Pixel size - 1.12 μm
Phase detection
6-element lens
Secondary rear camera - 2 MP
Aperture size - f/2.4 (#2)

Secondary camera

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

Sensor modelGalaxyCore GC8034--
Sensor typeCMOS BSI--
Sensor size3.67 x 2.76 mm
0.18 in
--
Pixel size1.124 µm
0.001124 mm
--
Crop factor9.42--
Aperturef/2-f/2
Focal length3.88 mm
36.56 mm *(35 mm / full frame)
--
Image resolution3264 x 2448 pixels
7.99 MP
3264 x 2448 pixels
7.99 MP
4608 x 3456 pixels
15.93 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1280 x 720 pixels
0.92 MP
Video FPS30 fps30 fps30 fps
Face unlockFace unlockFace unlock

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Headphone adapterSmart PA-

Radio

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

RadioYesYesNo
RDS--

Tracking/Positioning

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

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

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
Dual band
Wi-Fi Hotspot
Wi-Fi Display

Bluetooth

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

Version4.24.24.2
FeaturesA2DPA2DP
LE
A2DP

USB

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

Connector typeUSB Type-CMicro USBMicro USB
Version2.02.02.0
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
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
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
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
DivX
Flash Video
H.263
H.264
MKV
QuickTime
MP4
WebM
WMV
Xvid
3GPP
AVI
DivX
H.263
H.264
H.265
MKV
MP4
VC-1
Xvid
3GPP
AVI
DivX
Flash Video
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.

Capacity6000 mAh4000 mAh4230 mAh
TypeLi-PolymerLi-PolymerLi-Polymer
2G talk time-27 h
1620 min
1.1 days
-
2G stand-by time-400 h
24000 min
16.7 days
-
3G talk time-27 h
1620 min
1.1 days
-
3G stand-by time-400 h
24000 min
16.7 days
-
Charger output power5 V / 6 A5 V / 2 A-
FeaturesFast charging
Non-removable
Non-removableNon-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)-0.577 W/kg-
Body SAR (EU)-1.251 W/kg-
Head SAR (USA)-1.1 W/kg-
Body SAR (USA)-1.02 W/kg-

Additional features

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

Additional features-M1810F6LI - SAR (Specific Absorption Rate) India: head - 1.031 W/kg; body - 0.573 W/kg
P2i nano-coating
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 Oukitel K9Xiaomi Redmi 7Oppo A7n