Comparison between:
- Xiaomi Redmi 7A
- Xiaomi Redmi Note 4X
- Xiaomi Redmi 4X

Brand and model

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

Xiaomi Redmi 7AXiaomi Redmi Note 4XXiaomi Redmi 4X
Xiaomi Redmi 7A
Prices
Xiaomi Redmi Note 4X
Prices
Xiaomi Redmi 4X
Prices
Model alias-Redmi Note 4X Hatsune Miku Special Edition
Red Rice Note 4X
Hongmi 4X
Red Rice 4X

Design

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

Width70.41 mm
7.041 cm
0.231 ft
2.772 in
76 mm
7.6 cm
0.249 ft
2.992 in
69.96 mm
6.996 cm
0.23 ft
2.754 in
Height146.3 mm
14.63 cm
0.48 ft
5.76 in
151 mm
15.1 cm
0.495 ft
5.945 in
139.24 mm
13.924 cm
0.457 ft
5.482 in
Thickness9.55 mm
0.955 cm
0.031 ft
0.376 in
8.45 mm
0.845 cm
0.028 ft
0.333 in
8.65 mm
0.865 cm
0.028 ft
0.341 in
Weight165 g
0.36 lbs
5.82 oz
165 g
0.36 lbs
5.82 oz
150 g
0.33 lbs
5.29 oz
Volume98.37 cm³
5.97 in³
96.97 cm³
5.89 in³
84.26 cm³
5.12 in³
ColorsBlack
Blue
Pink
Green
Champagne
Black
Silver
Black
Pink
Champagne
Body materialsPolycarbonateAluminium alloy
Plastic
Metal

SIM card

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

SIM card typeNano-SIMMicro-SIM
Nano-SIM / microSD
Micro-SIM
Nano-SIM / microSD
Number of SIM cards222
FeaturesDual 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
CDMACDMA 800 MHzCDMA 800 MHzCDMA 800 MHz
W-CDMAW-CDMA 850 MHz
W-CDMA 900 MHz
W-CDMA 2100 MHz
W-CDMA 850 MHz
W-CDMA 900 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-SCDMATD-SCDMA 1900 MHz
TD-SCDMA 2000 MHz
TD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
TD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 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 850 MHz
LTE 900 MHz
LTE 1800 MHz
LTE 2100 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 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

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
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 4
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 V10.2 (Android 9.0 Pie)
MIUI V11.0.1 (Android 10)
MIUI V8.2 (Android 6.0.1 Marshmallow)
MIUI V8.x (Android 7.0 Nougat)
MIUI V9
MIUI V10
MIUI V8 (Android 6.0.1 Marshmallow)
MIUI V8.2 (Android 7.1.1 Nougat)
MIUI V10

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 439Qualcomm Snapdragon 625 MSM8953Qualcomm Snapdragon 435 MSM8940
Process technology12 nm14 nm28 nm
CPU4x 1.95 GHz ARM Cortex-A53, 4x 1.45 GHz ARM Cortex-A53ARM Cortex-A534x 1.4 GHz ARM Cortex-A53, 4x 1.1 GHz ARM Cortex-A53
CPU bits64 bit64 bit64 bit
Instruction setARMv8ARMv8ARMv8
CPU cores888
CPU frequency1950 MHz2000 MHz1400 MHz
GPUQualcomm Adreno 505Qualcomm Adreno 506Qualcomm Adreno 505
GPU frequency-650 MHz-
RAM capacity2 GB
3 GB
3 GB
4 GB
2 GB
3 GB
RAM typeLPDDR3LPDDR3LPDDR3
RAM channelsSingle channelSingle channelSingle channel
RAM frequency-933 MHz800 MHz

Storage

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

Storage16 GB
32 GB
16 GB
32 GB
64 GB
16 GB
32 GB
64 GB
-eMMC 5.0-

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 size5.45 in
138.43 mm
13.84 cm
5.5 in
139.7 mm
13.97 cm
5 in
127 mm
12.7 cm
Width2.44 in
61.91 mm
6.19 cm
2.7 in
68.49 mm
6.85 cm
2.45 in
62.26 mm
6.23 cm
Height4.87 in
123.82 mm
12.38 cm
4.79 in
121.76 mm
12.18 cm
4.36 in
110.69 mm
11.07 cm
Aspect ratio2:1
2:1 (18:9)
1.778:1
16:9
1.778:1
16:9
Resolution720 x 1440 pixels1080 x 1920 pixels720 x 1280 pixels
Pixel density295 ppi
115 ppcm
401 ppi
157 ppcm
294 ppi
115 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area74.65 %72.9 %70.98 %
Other featuresCapacitive
Multi-touch
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
2.5D curved glass screen
1000:1 contrast ratio
70.8% NTSC
Display manufacturer - Boe / Tianma
2.5D curved glass screen
1000:1 contrast ratio
450 cd/m²
72% NTSC
2.5D curved glass screen
1000:1 contrast ratio
450 cd/m²
72% NTSC

Sensors

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

SensorsProximity
Light
Accelerometer
Compass
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Hall
Proximity
Light
Accelerometer
Gyroscope
Fingerprint
-Fingerprint sensor model - Fingerprint Cards FPC1035 / GoodixFingerprint sensor model - Fingerprint Cards FPC1035

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 IMX486 Exmor RSSony IMX258 Exmor RSSamsung S5K3L8
Sensor typeCMOSCMOSISOCELL
Sensor size-4.71 x 3.49 mm
0.23 in
4.69 x 3.52 mm
0.23 in
Sensor format1/2.9"-1/3.1"
Pixel size1.25 µm
0.001250 mm
1.133 µm
0.001133 mm
1.127 µm
0.001127 mm
Crop factor-7.377.38
ISO-100 - 1600-
Aperturef/2.2f/2f/2
Focal length and 35 mm equivalent-3.57 mm
26.33 mm *(35 mm / full frame)
3.57 mm
26.34 mm *(35 mm / full frame)
Number of lenses-55
Flash typeDual LEDDual LEDLED
Image resolution4160 x 3120 pixels
12.98 MP
4160 x 3120 pixels
12.98 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 fps30 fps30 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Optical zoom
Digital 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)
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
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
-Available also with Samsung S5K3L8 (ISOCELL)
720p @ 120 fps
Pixel size - 1.12 µm
Sensor type - ISOCELL Fast

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 S5K5E8OmniVision OV5675
Sensor type-CMOS BSIPureCel
Sensor size-2.9 x 2.15 mm
0.14 in
2.98 x 2.21 mm
0.15 in
Sensor format--1/5"
Pixel size-1.119 µm
0.001119 mm
1.12 µm
0.001120 mm
Crop factor-11.9911.66
Aperture-f/2f/2.2
Focal length and 35 mm equivalent-2.64 mm
31.63 mm *(35 mm / full frame)
2.64 mm
30.79 mm *(35 mm / full frame)
Field of view-85 °-
Image resolution2592 x 1944 pixels
5.04 MP
2592 x 1944 pixels
5.04 MP
2592 x 1944 pixels
5.04 MP
Video resolution1920 x 1080 pixels
2.07 MP
1280 x 720 pixels
0.92 MP
1280 x 720 pixels
0.92 MP
Video FPS30 fps30 fps30 fps
FeaturesFace unlock--

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece

Radio

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

RadioYesYesYes

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

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
Wi-Fi Display
802.11a
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

Bluetooth

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

Version4.24.24.2
FeaturesA2DP
LE
A2DP
HID
LE
A2DP
HID

USB

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

Connector typeMicro USBMicro USBMicro USB
Version2.02.02.0
FeaturesCharging
Host
Mass storage
On-The-Go
Charging
Host
Mass storage
On-The-Go
Charging
Mass storage

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
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

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
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
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
DivX
H.263
H.264
H.265
MKV
MP4
VC-1
Xvid
3GPP
AVI
H.263
H.264
H.265
MKV
QuickTime
VC-1
Xvid
3GPP
AVI
H.263
H.264
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 mAh4100 mAh4100 mAh
TypeLi-PolymerLi-PolymerLi-Polymer
2G talk time25 h
1500 min
1 days
18 h
1080 min
0.8 days
36 h
2160 min
1.5 days
2G stand-by time-264 h
15840 min
11 days
432 h
25920 min
18 days
3G talk time25 h
1500 min
1 days
18 h
1080 min
0.8 days
18 h
1080 min
0.8 days
3G stand-by time-264 h
15840 min
11 days
432 h
25920 min
18 days
4G stand-by time--432 h
25920 min
18 days
Charger output power5 V / 2 A5 V / 2 A5 V / 2 A
FeaturesNon-removableNon-removableNon-removable
-Battery model: BN43-

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)0.557 W/kg0.724 W/kg0.583 W/kg
Body SAR (EU)1.166 W/kg0.674 W/kg1.5 W/kg
Head SAR (USA)1 W/kg0.85 W/kg0.75 W/kg
Body SAR (USA)1.12 W/kg0.69 W/kg0.612 W/kg

Additional features

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

Additional featuresP2i nano-coating--
 Xiaomi Redmi 7AXiaomi Redmi Note 4XXiaomi Redmi 4X