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

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

	Xiaomi Redmi 4A	Xiaomi Redmi 4X	Xiaomi Redmi Note 4X

Model alias	Hongmi 4A Red Rise 4A	Hongmi 4X Red Rice 4X	Redmi Note 4X Hatsune Miku Special Edition Red Rice Note 4X

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

Width	70.4 mm 7.04 cm 0.231 ft 2.772 in	69.96 mm 6.996 cm 0.23 ft 2.754 in	76 mm 7.6 cm 0.249 ft 2.992 in
Height	139.5 mm 13.95 cm 0.458 ft 5.492 in	139.24 mm 13.924 cm 0.457 ft 5.482 in	151 mm 15.1 cm 0.495 ft 5.945 in
Thickness	8.5 mm 0.85 cm 0.028 ft 0.335 in	8.65 mm 0.865 cm 0.028 ft 0.341 in	8.45 mm 0.845 cm 0.028 ft 0.333 in
Weight	131 g 0.29 lbs 4.64 oz	150 g 0.33 lbs 5.29 oz	165 g 0.36 lbs 5.82 oz
Volume	83.48 cm³ 5.07 in³	84.26 cm³ 5.12 in³	96.97 cm³ 5.89 in³
Colors	Gold Rose-gold	Black Pink Champagne	Pink Green Champagne Black Silver
Body materials	Plastic	Metal	Aluminium alloy Plastic

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

SIM card type	Micro-SIM Nano-SIM / microSD	Micro-SIM Nano-SIM / microSD	Nano-SIM / microSD Nano-SIM
Number of SIM cards	2	2	2

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSM	GSМ 850 МНz GSМ 900 МНz GSМ 1900 МНz	GSМ 850 МНz GSМ 900 МНz GSМ 1900 МНz	GSМ 850 МНz GSМ 900 МНz GSМ 1900 МНz
CDMA	CDMA 800 MHz	CDMA 800 MHz	CDMA 800 MHz
W-CDMA	-	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-SCDMA	TD-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
UMTS	UМТS 900 МНz UМТS 1900 МНz UМТS 2100 МНz	-	-
LTE	LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2500 МНz (В41) LТЕ-ТDD 2600 МНz (В38) LТЕ 1800 МНz LТЕ 2600 МНz	LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2500 МНz (В41) LТЕ-ТDD 2600 МНz (В38) LТЕ 850 МНz LТЕ 900 МНz LТЕ 1800 МНz LТЕ 2600 МНz	LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2500 МНz (В41) LТЕ-ТDD 2600 МНz (В38) LТЕ 850 МНz LТЕ 1800 МНz LТЕ 2600 МНz

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologies

UМТS
GРRS
LТЕ Саt 4

UМТS
GРRS
LТЕ Саt 6

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

Operating system (OS)

МΙUΙ V8 (Аndrоid 6.0.1 Маrshmаllоw)
МΙUΙ V9.7.11 (Аndrоid 7.1.2 Νоugаt)
МΙUΙ V10
МΙUΙ V11

МΙUΙ V8 (Аndrоid 6.0.1 Маrshmаllоw)
МΙUΙ V8.2 (Аndrоid 7.1.1 Νоugаt)
МΙUΙ V10

МΙUΙ V8.2 (Аndrоid 6.0.1 Маrshmаllоw)
МΙUΙ V8.х (Аndrоid 7.0 Νоugаt)
МΙUΙ V9
МΙUΙ V10
МΙUΙ V11.0.2 (Аndrоid 7.0 ΝRD90М)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoC	Quаlсоmm Snарdrаgоn 425 (МSМ8917)	Quаlсоmm Snарdrаgоn 435 (МSМ8940)	Quаlсоmm Snарdrаgоn 625 (МSМ8953)
Process technology	28 nm	28 nm	14 nm
CPU	4х 1.4 GНz АRМ Соrtех-А53	4х 1.4 GНz АRМ Соrtех-А53, 4х 1.1 GНz АRМ Соrtех-А53	8х 2.0 GНz АRМ Соrtех-А53
CPU bits	32 bit	32 bit	64 bit
Instruction set	ARMv7	ARMv7	ARMv8-A
Level 1 cache memory (L1)	16 KB + 16 KB	16 KB + 16 KB	16 KB + 16 KB
CPU cores	4	8	8
CPU frequency	1400 MHz	1400 MHz	2000 MHz
GPU	Qualcomm Adreno 308	Qualcomm Adreno 505	Qualcomm Adreno 506
GPU frequency	598 MHz	475 MHz	650 MHz
RAM capacity	2 GB 3 GB	2 GB 3 GB	3 GB 4 GB
RAM type	LPDDR3	LPDDR3	LPDDR4
RAM channels	Single channel	Single channel	Single channel
RAM frequency	567 MHz	700 MHz	1066 MHz

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

Storage	16 GB 32 GB	16 GB 32 GB 64 GB	16 GB 32 GB 64 GB
	-	UFS 2.0	UFS 2.1

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

Types

microSD
microSDHC
microSDXC

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

Type/technology	IPS	IPS	IPS
Diagonal size	5 in 127 mm 12.7 cm	5 in 127 mm 12.7 cm	5.5 in 139.7 mm 13.97 cm
Width	2.14 in 54.37 mm 5.44 cm	2.24 in 56.8 mm 5.68 cm	2.35 in 59.8 mm 5.98 cm
Height	4.52 in 114.77 mm 11.48 cm	4.47 in 113.59 mm 11.36 cm	4.97 in 126.25 mm 12.63 cm
Aspect ratio	2.111:1	2:1 2:1 (18:9)	2.111:1
Resolution	720 x 1520 pixels	720 x 1440 pixels	720 x 1520 pixels
Pixel density	336 ppi 132 ppcm	322 ppi 126 ppcm	306 ppi 120 ppcm
Color depth	24 bit 16777216 colors	24 bit 16777216 colors	24 bit 16777216 colors
Display area	63.74 %	66.44 %	66.01 %
Other features	Capacitive Multi-touch	Capacitive Multi-touch	Capacitive Multi-touch Scratch resistant
	1000:1 contrast ratio 72% NTSC	2.5D curved glass screen 1000:1 contrast ratio 450 cd/m² 72% NTSC	Display manufacturer - Boe / Tianma 2.5D curved glass screen 1000:1 contrast ratio 450 cd/m² 72% NTSC

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

Sensors	Proximity Light Accelerometer	Proximity Light Accelerometer Gyroscope	Proximity Light Accelerometer Compass Gyroscope Fingerprint
	-	Fingerprint sensor model - Fingerprint Cards FPC1035	Fingerprint sensor model - Fingerprint Cards FPC1035 / Goodix

The main camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor model	OmniVision OV13850	Samsung S5K3L8	Sony IMX258 Exmor RS
Sensor type	PureCel	ISOCELL	CMOS
Sensor size	-	4.69 x 3.52 mm 0.23 in	4.71 x 3.49 mm 0.23 in
Sensor format	-	1/3.1"	-
Pixel size	-	1.127 µm 0.001127 mm	1.133 µm 0.001133 mm
Crop factor	-	7.38	7.37
ISO	-	-	100 - 1600
Aperture	f/2.2	f/2	f/2
Focal length and 35 mm equivalent	4.92 mm	3.57 mm 26.34 mm ^{*(35 mm / full frame)}	3.57 mm 26.33 mm ^{*(35 mm / full frame)}
Number of lenses	5	5	5
Flash type	Dual LED	LED	Dual LED
Image resolution	4160 x 3120 pixels 12.98 MP	4160 x 3120 pixels 12.98 MP	4160 x 3120 pixels 12.98 MP
Video resolution	1920 x 1080 pixels 2.07 MP	1920 x 1080 pixels 2.07 MP	1920 x 1080 pixels 2.07 MP
Video FPS	30 fps	30 fps	30 fps
Features	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 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)
	-	Pixel size - 1.12 µm Sensor type - ISOCELL Fast	Available also with Samsung S5K3L8 (ISOCELL) 720p @ 120 fps

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	OmniVision OV5675	OmniVision OV5675	Samsung S5K5E8
Sensor type	PureCel	PureCel	CMOS BSI
Sensor size	-	2.98 x 2.21 mm 0.15 in	2.9 x 2.15 mm 0.14 in
Sensor format	-	1/5"	-
Pixel size	-	1.12 µm 0.001120 mm	1.119 µm 0.001119 mm
Crop factor	-	11.66	11.99
Aperture	f/2.2	f/2.2	f/2
Focal length and 35 mm equivalent	2 mm	2.64 mm 30.79 mm ^{*(35 mm / full frame)}	2.64 mm 31.63 mm ^{*(35 mm / full frame)}
Field of view	-	-	85 °
Image resolution	2592 x 1944 pixels 5.04 MP	2592 x 1944 pixels 5.04 MP	2592 x 1944 pixels 5.04 MP
Video resolution	1920 x 1080 pixels 2.07 MP	1280 x 720 pixels 0.92 MP	1280 x 720 pixels 0.92 MP
Video FPS	30 fps	30 fps	30 fps

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

Speaker

Loudspeaker
Earpiece

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

Radio

Yes

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

Tracking/Positioning

GРS
А-GРS

GРS
А-GРS
GLОΝАSS

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

Wi-Fi

802.11b
802.11g
802.11а

802.11b
802.11g
802.11а
802.11аd

802.11а
802.11b
802.11g
Wi-Fi Disрlаy
802.11а
802.11ас 5GНz

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

Version	4.2	4.2	4.2
Features	A2DP HID	A2DP HID	A2DP HID LE

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

Connector type	Micro USB	Micro USB	USB Type-C
Version	2.0	2.0	2.0
Features	Charging Host Mass storage On-The-Go	Charging Mass storage	Charging Host Mass storage On-The-Go

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 jack

Yes

Information about other important connectivity technologies supported by the devices.

Connectivity

Computer sync
OTA sync
Infrared
Tethering
VoLTE

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

Browser

HTML
HTML5
CSS 3

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecs

AAC
AC3
AMR
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV

AAC
AAC+
AMR
AMR-WB
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs

3GPP
AVI
H.263
H.264
MKV
MP4
VC-1
VP8
Xvid

3GPP
AVI
H.263
H.264
H.265
MKV
QuickTime
VC-1
Xvid

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

Capacity	3120 mAh	4100 mAh	4100 mAh
Type	Li-Polymer	Li-Polymer	Li-Polymer
2G talk time	-	36 h 2160 min 1.5 days	18 h 1080 min 0.8 days
2G stand-by time	-	432 h 25920 min 18 days	264 h 15840 min 11 days
3G talk time	-	18 h 1080 min 0.8 days	18 h 1080 min 0.8 days
3G stand-by time	-	432 h 25920 min 18 days	264 h 15840 min 11 days
4G stand-by time	-	432 h 25920 min 18 days	-
Charger output power	5 V / 1 A	5 V / 2 A	5 V / 2 A
Features	Non-removable	Non-removable	Non-removable
	-	-	Battery model: BN43

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)	-	1.033 W/kg	1.064 W/kg
Body SAR (EU)	-	1.92 W/kg	0.984 W/kg
Head SAR (USA)	-	1.12 W/kg	1.14 W/kg
Body SAR (USA)	-	0.972 W/kg	0.96 W/kg
Head SAR (India)	0.525 W/kg	-	-
Body SAR (India)	1.181 W/kg	-	-

Xiaomi Redmi 4A

Xiaomi Redmi 4X

Xiaomi Redmi Note 4X

Huawei Ascend P7

Xiaomi Redmi Note 11 4G

Xiaomi 14

Xiaomi Mi 2a

OnePlus 6T