Comparison between:
- Xiaomi Redmi 9 India
- Samsung Galaxy A21
- Xiaomi Redmi 6 Pro
- Vivo V21 5G
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Xiaomi Redmi 9 India | Samsung Galaxy A21 | Xiaomi Redmi 6 Pro | Vivo V21 5G | |
 |  |  |  | |
| Model alias | Redmi 9 IN | SM-A215U SM-A215U1 SM-S215DL SM-A215W | Redmi 6Pro | V2050 |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 77.07 mm 7.707 cm 0.253 ft 3.034 in | 75.3 mm 7.53 cm 0.247 ft 2.965 in | 71.68 mm 7.168 cm 0.235 ft 2.822 in | 73.9 mm 7.39 cm 0.242 ft 2.909 in |
| Height | 164.9 mm 16.49 cm 0.541 ft 6.492 in | 163.7 mm 16.37 cm 0.537 ft 6.445 in | 149.33 mm 14.933 cm 0.49 ft 5.879 in | 159.68 mm 15.968 cm 0.524 ft 6.287 in |
| Thickness | 9 mm 0.9 cm 0.03 ft 0.354 in | 8.9 mm 0.89 cm 0.029 ft 0.35 in | 8.75 mm 0.875 cm 0.029 ft 0.344 in | 7.29 mm 0.729 cm 0.024 ft 0.287 in |
| Weight | 196 g 0.43 lbs 6.91 oz | 192 g 0.42 lbs 6.77 oz | 178 g 0.39 lbs 6.28 oz | 176 g 0.39 lbs 6.21 oz |
| Volume | 114.38 cm³ 6.95 in³ | 109.71 cm³ 6.66 in³ | 93.66 cm³ 5.69 in³ | 86.02 cm³ 5.22 in³ |
| Colors | Carbon Black Sky Blue Sporty Orange | Black | Gold Rose-gold Blue Red Black | Sunset Dazzle Dusk Blue Arctic White |
| Body materials | Plastic | Plastic | Aluminium alloy Polycarbonate | 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 | Nano-SIM | Nano-SIM | Nano-SIM Nano-SIM / microSD |
| Number of SIM cards | 2 | 1 | 2 | 2 |
| 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) Dual SIM optional (A variant of the model with two SIM card slots is available) | 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.
| GSM | GSМ 850 МНz (В5) GSМ 900 МНz (В8) GSМ 1900 МНz (В2) | GSМ 850 МНz (В5) GSМ 900 МНz (В8) GSМ 1900 МНz (В2) | 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 (BC0) | - | CDMA 800 MHz | - |
| W-CDMA | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 1700 MHz (B4) W-CDMA 1900 MHz (B2) W-CDMA 2100 MHz (B1) | - | - | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 1700 MHz (B4) W-CDMA 1900 MHz (B2) W-CDMA 2100 MHz (B1) |
| TD-SCDMA | - | - | TD-SCDMA 1880-1920 MHz TD-SCDMA 2010-2025 MHz | - |
| UMTS | - | UМТS 900 МНz (В8) UМТS 1900 МНz (В2) UМТS 2100 МНz (В1) | UМТS 900 МНz UМТS 1900 МНz UМТS 2100 МНz | - |
| LTE | LТЕ-FDD 800 МНz (В20) LТЕ-FDD 850 МНz (В5) LТЕ-FDD 900 МНz (В8) LТЕ-FDD 1700 МНz (В4) LТЕ-FDD 1800 МНz (В3) LТЕ-FDD 1900 МНz (В2) LТЕ-FDD 2100 МНz (В1) LТЕ-FDD 2600 МНz (В7) LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2000 МНz (В34) 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) | 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-FDD 700 МНz (В28) LТЕ-FDD 800 МНz (В20) LТЕ-FDD 850 МНz (В5) LТЕ-FDD 900 МНz (В8) LТЕ-FDD 1700 МНz (В4) LТЕ-FDD 1800 МНz (В3) LТЕ-FDD 2100 МНz (В1) LТЕ-FDD 2600 МНz (В7) LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2000 МНz (В34) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2600 МНz (В38) |
| 5G NR | - | - | - | 5G-FDD 1800 MHz (n3) 5G-FDD 2100 MHz (n1) 5G-TDD 2500 MHz (n41) 5G-TDD 3500 MHz (n78) 5G-TDD 3700 MHz (n77) |
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 12 | UМТS НSРА+ | UМТS GРRS LТЕ Саt 6 | UМТS GРRS LТЕ Саt 12 ТD-SСDМА |
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 V12 (Аndrоid 10) | Аndrоid 10 | МΙUΙ V9.6 (Аndrоid 8.1 Оrео) МΙUΙ V10.3.2 (Аndrоid 9.0 Рiе) | FunТоuсh ОS 11.1 (Аndrоid 11) |
| 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 | МеdiаТеk Неliо G35 (МТ6765G) | МеdiаТеk Неliо Р35 (МТ6765) | Quаlсоmm Snарdrаgоn 625 (МSМ8953) | МеdiаТеk Dimеnsity 800U (МТ6853V/ТΝΖА) |
| Process technology | 12 nm | 12 nm | 14 nm | 7 nm |
| CPU | 4х 2.3 GНz АRМ Соrtех-А53, 4х 1.8 GНz АRМ Соrtех-А53 | 4х 2.3 GНz АRМ Соrtех-А53, 4х 1.8 GНz АRМ Соrtех-А53 | 8х 2.0 GНz АRМ Соrtех-А53 | 2х 2.4 GНz АRМ Соrtех-А76, 6х 2.0 GНz АRМ Соrtех-А55 |
| CPU bits | 64 bit | 64 bit | 64 bit | 64 bit |
| Instruction set | ARMv8-A | ARMv8-A | ARMv8-A | ARMv8.2-A |
| Level 1 cache memory (L1) | 16 KB + 16 KB | 16 KB + 16 KB | 16 KB + 16 KB | 16 KB + 16 KB |
| CPU cores | 8 | 8 | 8 | 8 |
| CPU frequency | 2300 MHz | 2300 MHz | 2000 MHz | 2400 MHz |
| GPU | IMG PowerVR GE8320 | IMG PowerVR GE8320 | Qualcomm Adreno 506 | ARM Mali-G57 MC3 |
| GPU cores | - | - | - | 3 |
| GPU frequency | 680 MHz | 680 MHz | 650 MHz | 950 MHz |
| RAM capacity | 4 GB | 3 GB | 3 GB 4 GB | 8 GB |
| RAM type | LPDDR4X | LPDDR4X | LPDDR3 | LPDDR4X |
| RAM channels | Double channel | Double channel | Single channel | Double channel |
| RAM frequency | 1500 MHz | 1733 MHz | 833 MHz | 2033 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 64 GB 128 GB | 32 GB | 32 GB 64 GB | 128 GB |
| UFS 2.0 | UFS 2.1 | - | 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 | 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 | Super AMOLED | IPS | AMOLED |
| Diagonal size | 6.53 in 165.86 mm 16.59 cm | 6.5 in 165.1 mm 16.51 cm | 5.84 in 148.34 mm 14.83 cm | 6.44 in 163.58 mm 16.36 cm |
| Width | 3.2 in 81.32 mm 8.13 cm | 2.67 in 67.75 mm 6.78 cm | 2.4 in 60.87 mm 6.09 cm | 2.76 in 70.02 mm 7 cm |
| Height | 5.69 in 144.56 mm 14.46 cm | 5.93 in 150.56 mm 15.06 cm | 5.33 in 135.27 mm 13.53 cm | 5.82 in 147.83 mm 14.78 cm |
| Aspect ratio | 1.778:1 16:9 | 2.222:1 | 2.222:1 | 2.111:1 |
| Resolution | 1080 x 1920 pixels | 1080 x 2400 pixels | 1080 x 2400 pixels | 720 x 1520 pixels |
| Pixel density | 337 ppi 132 ppcm | 405 ppi 159 ppcm | 451 ppi 177 ppcm | 261 ppi 102 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 92.79 % | 83.02 % | 77.17 % | 88.01 % |
| Other features | Capacitive Scratch resistant | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant |
| 2.5D curved glass screen 400 cd/m² 70% NTSC 1500:1 TÜV Rheinland Certified Reading Mode | Infinity-O Display | 2.5D curved glass screen 1500:1 contrast ratio 84% NTSC | 2.5D curved glass screen 500 cd/m2 90 Hz refresh rate HDR10+ |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer | Proximity Light Accelerometer Compass Gyroscope Fingerprint | Proximity Light Accelerometer Compass Gyroscope | Proximity Light Accelerometer Compass Gyroscope |
| - | - | Fingerprint sensor model - Fingerprint Cards FPC1028; Goodix | In-display fingerprint sensor |
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 IMX486 Exmor RS | - |
| Sensor type | CMOS | CMOS | CMOS | CMOS BSI |
| Sensor format | - | - | 1/2.9" | 1/1.72" |
| Pixel size | - | - | 1.25 µm 0.001250 mm | 0.8 µm 0.000800 mm |
| Aperture | f/2.2 | - | f/2.2 | f/1.79 |
| Focal length and 35 mm equivalent | - | - | - | 26 mm *(35 mm / full frame) |
| Field of view | 75.2 ° | - | - | - |
| Number of lenses | - | - | 5 | 6 |
| Flash type | LED | LED | LED | LED |
| Image resolution | 4160 x 3120 pixels 12.98 MP | 4608 x 3456 pixels 15.93 MP | 4000 x 3000 pixels 12 MP | 9280 x 6920 pixels 64.22 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 3840 x 2160 pixels 8.29 MP |
| Video FPS | 30 fps | 30 fps | 30 fps | 30 fps |
| Features | Autofocus Digital zoom Digital 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 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 Phase detection autofocus (PDAF) | Autofocus Continuous shooting Digital zoom Digital image stabilization Optical 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) |
| - | - | 720p @ 120 fps Secondary rear camera - 5 MP Sensor model - Samsung S5K5E8 (#2) Sensor type - CMOS BSI (#2) Sensor size - 2.9 x 2.15 mm (#2) Pixel size - 1.12 μm (#2) Aperture size - f/2.2 (#2) | - |
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.
| Sensor format | - | - | - | 1/4" |
| Pixel size | - | - | - | 1.12 µm 0.001120 mm |
| Aperture | - | f/2.2 | - | f/2.2 |
| Focal length equivalent (35 mm) | - | - | - | 16 mm *(35 mm / full frame) |
| Field of view | - | - | - | 120 ° |
| Image resolution | - | 8 MP | - | 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.
| 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.
| Sensor model | GalaxyCore GC02M1 | - | - | - |
| Sensor format | 1/5" | - | - | - |
| Pixel size | 1.75 µm 0.001750 mm | - | - | - |
| Aperture | f/2.4 | - | - | f/2.4 |
| Number of lenses | - | - | - | 3 |
| Image resolution | 2 MP | 2 MP | - | 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 | - | - | OmniVision OV5675 | - |
| Sensor type | - | - | PureCel | CMOS |
| Sensor size | - | - | 2.98 x 2.21 mm 0.15 in | - |
| Pixel size | 1.12 µm 0.001120 mm | - | 1.151 µm 0.001151 mm | - |
| Crop factor | - | - | 11.66 | - |
| Aperture | f/2.2 | f/2 | f/2 | f/2 |
| Focal length and 35 mm equivalent | - | 2.61 mm 25 mm *(35 mm / full frame) | - | - |
| Auxiliary light | - | - | - | Dual LED |
| Image resolution | 3520 x 2270 pixels 7.99 MP | 4544 x 2856 pixels 12.98 MP | 2592 x 1944 pixels 5.04 MP | 44 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 3840 x 2160 pixels 8.29 MP |
| Video FPS | 30 fps | 30 fps | 30 fps | 30 fps |
| Features | Face unlock HDR Face detection | Face unlock | Face unlock | Autofocus Face unlock HDR Optical image stabilization |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece |
| 1712 linear speaker Vibration motor | - | - | - |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | Yes | Yes | No |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GРS А-GРS | 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 | 802.11b 802.11g 802.11а 802.11аd | 802.11b 802.11g 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 | 5.0 | 5.0 | 4.2 | 5.1 |
| Features | A2DP EDR HID LE | A2DP AVRCP DIP HFP HID HSP MAP OPP PAN PBAP HOGP | A2DP HID | A2DP LE |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | Micro USB | USB Type-C | Micro USB | Micro USB |
| Version | 2.0 | 2.0 | 2.0 | 2.0 |
| Features | Charging Mass storage On-The-Go | Charging 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 | No |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Infrared Tethering NFC VoLTE ViLTE VoWiFi | Computer sync OTA sync Tethering NFC VoLTE | Computer sync OTA sync Infrared Tethering VoLTE | Computer sync OTA sync Tethering VoLTE |
| NFC market dependent | - | - | - |
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 | 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 aptX aptX HD eAAC+ FLAC MIDI MP3 OGG WMA WAV LDAC | AAC AMR AMR-WB eAAC+ FLAC M4A MIDI MP3 OGG WMA WAV | AAC AAC+ AC3 AMR eAAC+ FLAC MIDI MP3 OGG WMA WAV | AMR-WB FLAC MIDI MP3 WAV MP2 AMR-NB Vorbis APE |
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 DivX H.263 H.264 H.265 MKV MP4 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 | 3GPP AVI H.263 H.264 MKV MP4 VC-1 VP8 Xvid | 3GPP AVI MKV MP4 |
Battery
The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.
| Capacity | 5000 mAh | 4000 mAh | 4000 mAh | 4000 mAh |
| Type | Li-Polymer | Li-Polymer | Li-Polymer | Li-Ion |
| 4G talk time | 33 h 1980 min 1.4 days | - | - | - |
| Charger output power | 5 V / 2 A | 5 V / 2 A 9 V / 1.67 A | 5 V / 2 A | 11 V / 3 A |
| Features | Fast charging Non-removable | Fast charging Non-removable | Non-removable | Fast charging 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.
| Body SAR (EU) | - | 1.11 W/kg | - | - |
| Head SAR (USA) | - | 0.29 W/kg | - | - |
| Body SAR (USA) | - | 1.04 W/kg | - | - |
| Simultaneous Body SAR (USA) | - | 1.27 W/kg | - | - |
| Head SAR (India) | - | - | 0.964 W/kg | 1.05 W/kg |
| Body SAR (India) | - | - | 0.78 W/kg | 0.87 W/kg |
| Wi-Fi Hotspot SAR | - | 1.27 W/kg | - | - |
| Simultaneous Wi-Fi SAR | - | 1.27 W/kg | - | - |
Additional features
Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.
| Additional features | P2i splash-proof nano-coating | - | M1805D1SI - SAR (Specific Absorption Rate) India: head - 0.964 W/kg; body - 0.780 W/kg | - |
| Xiaomi Redmi 9 India | Samsung Galaxy A21 | Xiaomi Redmi 6 Pro | Vivo V21 5G |