Comparison between:
- Xiaomi Redmi Note 4X
- Xiaomi Redmi Note 4X High Version
- Samsung Galaxy A21s
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Xiaomi Redmi Note 4X | Xiaomi Redmi Note 4X High Version | Samsung Galaxy A21s | |
 |  |  | |
| Model alias | Redmi Note 4X Hatsune Miku Special Edition Red Rice Note 4X | Hongmi Note 4X High Version Red Rice Note 4X High Version | SM-A217F SM-A217F/DS |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 76 mm 7.6 cm 0.249 ft 2.992 in | 76 mm 7.6 cm 0.249 ft 2.992 in | 75.3 mm 7.53 cm 0.247 ft 2.965 in |
| Height | 151 mm 15.1 cm 0.495 ft 5.945 in | 151 mm 15.1 cm 0.495 ft 5.945 in | 163.7 mm 16.37 cm 0.537 ft 6.445 in |
| Thickness | 8.45 mm 0.845 cm 0.028 ft 0.333 in | 8.45 mm 0.845 cm 0.028 ft 0.333 in | 8.9 mm 0.89 cm 0.029 ft 0.35 in |
| Weight | 165 g 0.36 lbs 5.82 oz | 165 g 0.36 lbs 5.82 oz | 192 g 0.42 lbs 6.77 oz |
| Volume | 96.97 cm³ 5.89 in³ | 96.97 cm³ 5.89 in³ | 109.71 cm³ 6.66 in³ |
| Colors | Pink Green Champagne Black Silver | Pink Green Champagne Black Silver | Black White Blue Red |
| Body materials | Aluminium alloy Plastic | Aluminium alloy Plastic | Plastic |
SIM card
The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.
| SIM card type | Nano-SIM / microSD Nano-SIM | Micro-SIM Nano-SIM / microSD | Nano-SIM |
| Number of SIM cards | 2 | 2 | 1 |
| Features | - | - | Dual SIM stand-by (Both cards are active. When one is busy, the other is not active) Dual SIM optional (A variant of the model with two SIM card slots is available) |
Networks
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 (В5) GSМ 900 МНz (В8) GSМ 1900 МНz (В2) |
| CDMA | 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 | - |
| UMTS | - | - | UМТS 900 МНz (В8) UМТS 1900 МНz (В2) UМТS 2100 МНz (В1) |
| LTE | 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 | LТЕ 850 МНz LТЕ 1800 МНz LТЕ 2100 МНz LТЕ 2600 МНz LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2600 МНz (В38) | LТЕ-FDD 800 МНz (В20) LТЕ-FDD 850 МНz (В5) LТЕ-FDD 900 МНz (В8) LТЕ-FDD 1800 МНz (В3) LТЕ-FDD 2100 МНz (В1) LТЕ-FDD 2600 МНz (В7) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2600 МНz (В38) |
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 technologies | UМТS GРRS LТЕ Саt 6 | UМТS GРRS LТЕ Саt 6 | UМТS НSРА+ |
Operating system
Operating system is the system software, which manages and controls the functioning of the hardware components of the device.
| Operating system (OS) | 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) | МΙUΙ V8.2 (Аndrоid 6.0.1 Маrshmаllоw) МΙUΙ V8.х (Аndrоid 7.0 Νоugаt) МΙUΙ V9 МΙUΙ V10 | Аndrоid 10 |
| User interface (UI) | - | - | One UI 2.0 |
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.
| SoC | Quаlсоmm Snарdrаgоn 625 (МSМ8953) | МеdiаТеk Неliо Х20 (МТ6797) | Sаmsung Ехynоs 850 (S5Е3830) |
| Process technology | 14 nm | 20 nm | 8 nm |
| CPU | 8х 2.0 GНz АRМ Соrtех-А53 | 2х 2.1 GНz АRМ Соrtех-А72, 4х 1.85 GНz АRМ Соrtех-А53, 4х 1.4 GНz АRМ Соrtех-А53 | 8х 2.0 GНz АRМ Соrtех-А55 |
| CPU bits | 64 bit | 64 bit | 64 bit |
| Instruction set | ARMv8-A | ARMv8-A | ARMv8.2-A |
| Level 1 cache memory (L1) | 16 KB + 16 KB | 16 KB + 16 KB | 16 KB + 16 KB |
| CPU cores | 8 | 10 | 8 |
| CPU frequency | 2000 MHz | 2100 MHz | 2000 MHz |
| GPU | Qualcomm Adreno 506 | ARM Mali-T880 MP4 | ARM Mali-G52 MP1 |
| GPU cores | - | 4 | 1 |
| GPU frequency | 650 MHz | 780 MHz | - |
| RAM capacity | 3 GB 4 GB | 4 GB | 3 GB 4 GB 6 GB |
| RAM type | LPDDR4 | LPDDR3 | LPDDR4X |
| RAM channels | Single channel | Double channel | Double channel |
| RAM frequency | 1066 MHz | 700 MHz | 1766 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 16 GB 32 GB 64 GB | 64 GB | 32 GB 64 GB 128 GB |
| UFS 2.1 | eMMC 5.0 | UFS 2.0 |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | 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/technology | IPS | IPS | PLS |
| Diagonal size | 5.5 in 139.7 mm 13.97 cm | 5.5 in 139.7 mm 13.97 cm | 6.5 in 165.1 mm 16.51 cm |
| Width | 2.35 in 59.8 mm 5.98 cm | 2.46 in 62.48 mm 6.25 cm | 2.91 in 73.83 mm 7.38 cm |
| Height | 4.97 in 126.25 mm 12.63 cm | 4.92 in 124.95 mm 12.5 cm | 5.81 in 147.67 mm 14.77 cm |
| Aspect ratio | 2.111:1 | 2:1 2:1 (18:9) | 2:1 2:1 (18:9) |
| Resolution | 720 x 1520 pixels | 720 x 1440 pixels | 1080 x 2160 pixels |
| Pixel density | 306 ppi 120 ppcm | 293 ppi 115 ppcm | 372 ppi 146 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 66.01 % | 68.24 % | 88.74 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant |
| Display manufacturer - Boe / Tianma 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 | Infinity-O Display |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Compass Gyroscope Fingerprint | Proximity Light Accelerometer Compass Gyroscope Fingerprint | Proximity Light Accelerometer Compass Gyroscope Fingerprint |
| Fingerprint sensor model - Fingerprint Cards FPC1035 / Goodix | Fingerprint sensor model - Fingerprint Cards FPC1035 / Goodix | - |
Main rear camera
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 | Sony IMX258 Exmor RS | Sony IMX258 Exmor RS | - |
| Sensor type | CMOS | CMOS | CMOS |
| Sensor size | 4.71 x 3.49 mm 0.23 in | 4.71 x 3.49 mm 0.23 in | - |
| Pixel size | 1.133 µm 0.001133 mm | 1.133 µm 0.001133 mm | - |
| Crop factor | 7.37 | 7.37 | - |
| ISO | 100 - 1600 | 100 - 1600 | - |
| Aperture | f/2 | f/2 | f/2 |
| Focal length and 35 mm equivalent | 3.57 mm 26.33 mm *(35 mm / full frame) | 3.57 mm 26.33 mm *(35 mm / full frame) | - |
| Number of lenses | 5 | 5 | - |
| Flash type | Dual LED | Dual LED | LED |
| Image resolution | 4160 x 3120 pixels 12.98 MP | 4160 x 3120 pixels 12.98 MP | 8000 x 6000 pixels 48 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 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 |
| Available also with Samsung S5K3L8 (ISOCELL) 720p @ 120 fps | Available also with Samsung S5K3L8 (ISOCELL) 720p @ 120 fps | - |
Ultra-wide camera
Specifications of the ultra-wide camera of the device. This type of camera captures a wider field of view compared to the main camera.
| Aperture | - | - | f/2.2 |
| Image resolution | - | - | 8 MP |
Macro camera
Specifications of the macro camera of the device. This type of camera in smartphones is used to snap close-up photos of tiny objects.
| Aperture | - | - | f/2.4 |
| Image resolution | - | - | 2 MP |
Depth-sensing camera
Specifications of the depth sensor of the device. Depth sensors measure the distance between the subject and the camera, enabling features such as bokeh in portraits.
| Aperture | - | - | f/2.4 |
| Image resolution | - | - | 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 S5K5E8 | Samsung S5K5E8 | - |
| Sensor type | CMOS BSI | CMOS BSI | - |
| Sensor size | 2.9 x 2.15 mm 0.14 in | 2.9 x 2.15 mm 0.14 in | - |
| Sensor format | - | - | 1/3.1" |
| Pixel size | 1.119 µm 0.001119 mm | 1.119 µm 0.001119 mm | 1.12 µm 0.001120 mm |
| Crop factor | 11.99 | 11.99 | - |
| Aperture | f/2 | f/2 | f/2.2 |
| Focal length and 35 mm equivalent | 2.64 mm 31.63 mm *(35 mm / full frame) | 2.64 mm 31.63 mm *(35 mm / full frame) | 2.61 mm 25 mm *(35 mm / full frame) |
| Field of view | 85 ° | 85 ° | - |
| Image resolution | 2592 x 1944 pixels 5.04 MP | 2592 x 1944 pixels 5.04 MP | 4416 x 2939 pixels 12.98 MP |
| Video resolution | 1280 x 720 pixels 0.92 MP | 1280 x 720 pixels 0.92 MP | 1920 x 1080 pixels 2.07 MP |
| Video FPS | 30 fps | 30 fps | 30 fps |
| Features | - | - | Face unlock |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | Yes | Yes |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GРS А-GРS GLОΝАSS | GРS А-GРS | GРS А-GРS |
Wi-Fi
Wi-Fi is a technology that provides wireless data connections between various devices within a short range.
| Wi-Fi | 802.11а 802.11b 802.11g Wi-Fi Disрlаy 802.11а 802.11ас 5GНz | 802.11а 802.11b 802.11g Wi-Fi Disрlаy 802.11а | 802.11а 802.11b 802.11g Wi-Fi Disрlаy 802.11а 802.11аd |
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
| Version | 4.2 | 4.2 | 5.0 |
| Features | A2DP HID LE | A2DP HID LE | A2DP AVRCP DIP HFP HID HSP MAP OPP PAN PBAP HOGP |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | USB Type-C | Micro USB | Micro USB |
| Version | 2.0 | 2.0 | 2.0 |
| Features | Charging Host 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 jack | Yes | Yes | Yes |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Infrared Tethering VoLTE | 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.
| Browser | 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/codecs | AAC AAC+ AMR AMR-WB eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AAC+ AMR AMR-WB eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AMR AMR-WB eAAC+ FLAC M4A 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/codecs | 3GPP AVI H.263 H.264 H.265 MKV QuickTime VC-1 Xvid | 3GPP AVI H.263 H.264 H.265 MKV QuickTime VC-1 Xvid | 3GPP 3GPP2 AVI Flash Video H.263 H.264 H.265 MKV MP4 VC-1 VP8 VP9 WebM WMV WMV7 WMV8 Xvid |
Battery
The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.
| Capacity | 4100 mAh | 4100 mAh | 5000 mAh |
| Type | Li-Polymer | Li-Polymer | Li-Polymer |
| 2G talk time | 18 h 1080 min 0.8 days | 18 h 1080 min 0.8 days | - |
| 2G stand-by time | 264 h 15840 min 11 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 | 264 h 15840 min 11 days | 264 h 15840 min 11 days | - |
| Charger output power | 5 V / 2 A | 5 V / 2 A | 5 V / 2 A 9 V / 1.67 A |
| Features | Non-removable | Non-removable | Fast charging Non-removable |
| Battery model: BN43 | 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) | 1.064 W/kg | - | 0.172 W/kg |
| Body SAR (EU) | 0.984 W/kg | - | 1.274 W/kg |
| Head SAR (USA) | 1.14 W/kg | - | - |
| Body SAR (USA) | 0.96 W/kg | - | - |
| Head SAR (India) | - | - | 0.813 W/kg |
| Xiaomi Redmi Note 4X | Xiaomi Redmi Note 4X High Version | Samsung Galaxy A21s |
