Comparison between:
- IUNI U2
- Nokia 8.1
- Xiaomi Redmi 7

Brand and model

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

IUNI U2Nokia 8.1Xiaomi Redmi 7
IUNI U2Nokia 8.1Xiaomi Redmi 7
Prices
Model aliasU810TA-1119
TA-1121
TA-1128
TA-1131
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.

Width65 mm
6.5 cm
0.213 ft
2.559 in
75.76 mm
7.576 cm
0.249 ft
2.983 in
75.58 mm
7.558 cm
0.248 ft
2.976 in
Height136.9 mm
13.69 cm
0.449 ft
5.39 in
154.8 mm
15.48 cm
0.508 ft
6.094 in
158.73 mm
15.873 cm
0.521 ft
6.249 in
Thickness10.2 mm
1.02 cm
0.033 ft
0.402 in
7.97 mm
0.797 cm
0.026 ft
0.314 in
8.47 mm
0.847 cm
0.028 ft
0.333 in
Weight145 g
0.32 lbs
5.11 oz
178 g
0.39 lbs
6.28 oz
180 g
0.4 lbs
6.35 oz
Volume90.76 cm³
5.51 in³
93.47 cm³
5.68 in³
101.61 cm³
6.17 in³
ColorsBlack
Silver
Green
Blue
Silver
Black
Copper
Red
Black
Blue
Body materialsAluminium alloyAluminium 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 typeMicro-SIMNano-SIM
Nano-SIM / microSD
Nano-SIM
Number of SIM cards122
Features--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 MHz
W-CDMAW-CDMA 900 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
UMTS-UMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
-
LTE-LTE 850 MHz
LTE 1700/2100 MHz
LTE 1800 MHz
LTE 1900 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 1900 MHz (B39)
LTE-TDD 2000 MHz (B34)
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

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+
UMTS
EDGE
GPRS
HSPA+
LTE Cat 6
UMTS
EDGE
GPRS
HSPA+
LTE
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)IUNI (Android 4.3 Jelly Bean)Android 9.0 PieMIUI V10 (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 800 MSM8974AAQualcomm Snapdragon 710Qualcomm Snapdragon 632
Process technology28 nm10 nm14 nm
CPUKrait 4002x 2.2 GHz Kryo 360, 6x 1.7 GHz Kryo 3604x 1.8 GHz Kryo 250, 4x 1.8 GHz Kryo 250
CPU bits32 bit64 bit64 bit
Instruction setARMv7ARMv8ARMv8
Level 0 cache memory (L0)4 KB + 4 KB--
Level 1 cache memory (L1)16 KB + 16 KB--
Level 2 cache memory (L2)2048 KB
2 MB
--
CPU cores488
CPU frequency2200 MHz2200 MHz1800 MHz
GPUQualcomm Adreno 330Qualcomm Adreno 616Qualcomm Adreno 506
GPU cores4--
GPU frequency450 MHz500 MHz-
RAM capacity2 GB
3 GB
4 GB
6 GB
2 GB
3 GB
4 GB
RAM typeLPDDR3LPDDR4XLPDDR3
RAM channelsDouble channelDouble channelSingle channel
RAM frequency800 MHz1866 MHz933 MHz

Storage

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

Storage16 GB
32 GB
64 GB
128 GB
16 GB
32 GB
64 GB
-eMMC 5.1eMMC 5.1

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/technologyIPSIPSIPS
Diagonal size4.7 in
119.38 mm
11.94 cm
6.18 in
156.97 mm
15.7 cm
6.26 in
159 mm
15.9 cm
Width2.3 in
58.53 mm
5.85 cm
2.65 in
67.2 mm
6.72 cm
2.68 in
68.07 mm
6.81 cm
Height4.1 in
104.05 mm
10.4 cm
5.59 in
141.86 mm
14.19 cm
5.66 in
143.7 mm
14.37 cm
Aspect ratio1.778:1
16:9
2.111:12.111:1
Resolution1080 x 1920 pixels1080 x 2280 pixels720 x 1520 pixels
Pixel density469 ppi
184 ppcm
408 ppi
160 ppcm
269 ppi
105 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area68.66 %81.55 %81.79 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Corning Gorilla Glass 3
LTPS (Low Temperature PolySilicon)
NEG Glass
Full Lamination Technology
1500:1 contrast ratio
500 cd/m²
96% NTSC
HDR10
Corning Gorilla Glass 5
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
1500:1 contrast ratio
84% NTSC

Sensors

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

SensorsProximity
Light
Accelerometer
Compass
Gyroscope
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Hall
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 modelOmniVision OV16825Sony IMX363 Exmor RS-
Sensor typeCMOS BSI 2CMOSCMOS
Sensor size6.24 x 4.67 mm
0.31 in
--
Sensor format-1/2.56"-
Pixel size1.354 µm
0.001354 mm
1.4 µm
0.001400 mm
1.25 µm
0.001250 mm
Crop factor5.55--
ISO100 - 1600--
Aperturef/2.2f/1.8f/2.2
Focal length and 35 mm equivalent5.45 mm
30.25 mm *(35 mm / full frame)
4.36 mm
25 mm *(35 mm / full frame)
-
Field of view-80 °-
Flash typeLEDDual LEDDual LED
Image resolution4608 x 3456 pixels
15.93 MP
4032 x 3024 pixels
12.19 MP
4032 x 3024 pixels
12.19 MP
Video resolution1920 x 1080 pixels
2.07 MP
3840 x 2160 pixels
8.29 MP
1920 x 1080 pixels
2.07 MP
Video FPS60 fps30 fps60 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Digital image stabilization
Geotagging
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Macro mode
Autofocus
Continuous shooting
Digital zoom
Optical zoom
Optical image stabilization
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
RAW
Phase detection autofocus (PDAF)
-Available also with Samsung S5K2L7 (ISOCELL)
Phase detection with Dual Pixel
Carl Zeiss lens
High CRI LED flash
Secondary rear camera - 13 MP
Sensor model - Samsung S5K3L6 (#2)
Sensor type - ISOCELL (#2)
Sensor size - 1/3.1" (#2)
Pixel size - 1.12 μm (#2)
Aperture size - f/2.2 (#2)
Carl Zeiss lens (#2)
720p @ 120 fps
Secondary rear camera - 2 MP

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-Samsung S5K3T1-
Sensor typeCMOS BSIISOCELL-
Sensor size5.44 x 3.07 mm
0.25 in
--
Pixel size2.024 µm
0.002024 mm
0.9 µm
0.000900 mm
-
Crop factor6.93--
Aperturef/2f/2-
Focal length and 35 mm equivalent-3.52 mm-
Image resolution2688 x 1520 pixels
4.09 MP
5184 x 3880 pixels
20.11 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 fps30 fps30 fps
Features--Face unlock
-Pixel size - 1.8 μm (4-in-1 pixel binning)
Carl Zeiss lens
-

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
-OZO AudioSmart 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/PositioningGPS
A-GPS
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-Fi802.11b
802.11g
802.11n
802.11ac
Wi-Fi Hotspot
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11b
802.11g
802.11n
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display

Bluetooth

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

Version4.05.04.2
FeaturesA2DPA2DPA2DP
LE

USB

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

Connector typeMicro USBUSB Type-CMicro USB
Version2.02.02.0
FeaturesCharging
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 jackYesYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Tethering
Computer sync
OTA sync
Tethering
NFC
VoLTE
VoWiFi
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

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
AMR
eAAC+
MP3
WMA
WAV
AAC
AMR
AMR-WB
eAAC+
FLAC
M4A
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
H.263
H.264
MPEG-4
WMV
3GPP
AVI
H.263
H.264
MKV
MP4
WMV
Xvid
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.

Capacity2200 mAh3500 mAh4000 mAh
TypeLi-PolymerLi-PolymerLi-Polymer
2G talk time9 h
540 min
0.4 days
-27 h
1620 min
1.1 days
2G stand-by time220 h
13200 min
9.2 days
-400 h
24000 min
16.7 days
3G talk time9 h
540 min
0.4 days
-27 h
1620 min
1.1 days
3G stand-by time220 h
13200 min
9.2 days
-400 h
24000 min
16.7 days
Charger output power-5 V / 3 A
9 V / 2 A
12 V / 1.5 A
5 V / 2 A
FeaturesNon-removableFast charging
Non-removable
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)-0.514 W/kg0.577 W/kg
Body SAR (EU)-1.49 W/kg1.251 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
 IUNI U2Nokia 8.1Xiaomi Redmi 7