Comparison between:
- Xiaomi Redmi Note 7 India
- Samsung Galaxy M21 2021
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Xiaomi Redmi Note 7 India | Samsung Galaxy M21 2021 | |
 |  | |
| Model alias | Redmi Note7 India | SM-M215G SM-M215G/DS |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 75.21 mm 7.521 cm 0.247 ft 2.961 in | 75.1 mm 7.51 cm 0.246 ft 2.957 in |
| Height | 159.21 mm 15.921 cm 0.522 ft 6.268 in | 159 mm 15.9 cm 0.522 ft 6.26 in |
| Thickness | 8.1 mm 0.81 cm 0.027 ft 0.319 in | 9 mm 0.9 cm 0.03 ft 0.354 in |
| Weight | 186 g 0.41 lbs 6.56 oz | 192 g 0.42 lbs 6.77 oz |
| Volume | 96.99 cm³ 5.89 in³ | 107.47 cm³ 6.53 in³ |
| Colors | Blue Red Black | Charcoal Black Arctic Blue |
| Body materials | Glass 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 Nano-SIM / microSD | Nano-SIM |
| Number of SIM cards | 2 | 2 |
| 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.
| GSM | GSМ 850 МНz GSМ 900 МНz GSМ 1900 МНz | GSМ 850 МНz (В5) GSМ 900 МНz (В8) GSМ 1900 МНz (В2) |
| W-CDMA | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz | - |
| UMTS | - | UМТS 900 МНz (В8) UМТS 1900 МНz (В2) UМТS 2100 МНz (В1) |
| LTE | 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 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 18 | UМТS GРRS LТЕ |
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 V10.2 (Аndrоid 9.0 Рiе) | Аndrоid 11 |
| User interface (UI) | - | One UI 3.1 Core |
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 660 (МSМ8976 Рlus) | Sаmsung Ехynоs 7 Осtа 9611 |
| Process technology | 14 nm | 10 nm |
| CPU | 4х 2.2 GНz АRМ Соrtех-А73, 4х 1.84 GНz АRМ Соrtех-А53 (Κryо 260) | 4х 2.3 GНz АRМ Соrtех-А73, 4х 1.7 GНz АRМ Соrtех-А53 |
| CPU bits | 64 bit | 64 bit |
| Instruction set | ARMv8-A | ARMv8-A |
| Level 1 cache memory (L1) | 16 KB + 16 KB | 16 KB + 16 KB |
| CPU cores | 8 | 8 |
| CPU frequency | 2200 MHz | 2300 MHz |
| GPU | Qualcomm Adreno 512 | ARM Mali-G72 MP3 |
| GPU cores | - | 3 |
| GPU frequency | 647 MHz | 850 MHz |
| RAM capacity | 3 GB 4 GB | 4 GB 6 GB |
| RAM type | LPDDR4 | LPDDR4X |
| RAM channels | Double channel | Double channel |
| RAM frequency | 1766 MHz | 1500 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 32 GB 64 GB | 64 GB 128 GB |
| eMMC 5.1 | - |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | microSD microSDHC microSDXC | microSD microSDHC microSDXC |
| - | UFS 2.1 |
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 |
| Diagonal size | 6.3 in 160.02 mm 16 cm | 6.4 in 162.56 mm 16.26 cm |
| Width | 2.7 in 68.5 mm 6.85 cm | 2.86 in 72.7 mm 7.27 cm |
| Height | 5.69 in 144.62 mm 14.46 cm | 5.72 in 145.4 mm 14.54 cm |
| Aspect ratio | 2.111:1 | 2:1 2:1 (18:9) |
| Resolution | 720 x 1520 pixels | 1080 x 2160 pixels |
| Pixel density | 267 ppi 104 ppcm | 377 ppi 148 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 83 % | 88.81 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch |
| Display manufacturer - Tianma Corning Gorilla Glass 5 2.5D curved glass screen LTPS (Low Temperature PolySilicon) 1500:1 contrast ratio 450 cd/m² 84% NTSC | Infinity U Display 2.5D curved glass screen Corning Gorilla Glass 3 Peak brightness - 420 cd/m² 78960:1 |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Compass Gyroscope | Proximity Accelerometer Compass Gyroscope Geomagnetic Fingerprint |
| Fingerprint sensor model - Fingerprint Cards FPC1511 | - |
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 | Samsung S5KGM2 |
| Sensor type | - | CMOS BSI |
| Sensor format | 1/2.9" | 1/2" |
| Pixel size | 1.25 µm 0.001250 mm | 0.8 µm 0.000800 mm |
| ISO | 100 - 3200 | - |
| Aperture | f/2.2 | f/2 |
| Focal length and 35 mm equivalent | - | 26 mm *(35 mm / full frame) |
| Number of lenses | 6 | - |
| Flash type | Dual LED | LED |
| Image resolution | 4032 x 3024 pixels 12.19 MP | 8000 x 6000 pixels 48 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 3840 x 2160 pixels 8.29 MP |
| Video FPS | 60 fps | 30 fps |
| Features | 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) RAW | 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) |
| Phase detection with Dual Pixel 1080p @ 120 fps 720p @ 120 fps Secondary rear camera - 2 MP 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 |
| Field of view | - | 123 ° |
| Image resolution | - | 8 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/2.2 |
| Image resolution | - | 5 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 type | - | CMOS BSI |
| Pixel size | 1.12 µm 0.001120 mm | - |
| Aperture | f/2 | f/2.2 |
| Focal length and 35 mm equivalent | - | 26 mm *(35 mm / full frame) |
| Image resolution | 4416 x 2939 pixels 12.98 MP | 20 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP |
| Video FPS | 30 fps | 30 fps |
| Features | Face unlock | Face unlock |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece |
| Smart PA Texas Instruments TAS2563 | Dolby Atmos for stereo headsets Widevine L1 Certification |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | Yes |
| - | RDS |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | 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 | 802.11а 802.11b 802.11g Wi-Fi Disрlаy 802.11а |
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
| Version | 5.0 | 5.0 |
| Features | A2DP LE | A2DP LE |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | Micro USB | Micro USB |
| Version | 2.0 | 2.0 |
| Features | 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 |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Infrared Tethering VoLTE | Computer sync OTA sync Tethering |
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 |
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 |
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 |
Battery
The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.
| Capacity | 4000 mAh | 6000 mAh |
| Type | Li-Polymer | Li-Ion |
| 2G talk time | 27 h 1620 min 1.1 days | - |
| 2G stand-by time | 251 h 15060 min 10.5 days | - |
| 3G talk time | 27 h 1620 min 1.1 days | - |
| 3G stand-by time | 251 h 15060 min 10.5 days | - |
| Charger output power | 5 V / 2 A | 5 V / 3 A |
| Quick charge technology | Qualcomm Quick Charge 4.0 | - |
| Features | Fast charging 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.
| Head SAR (EU) | - | 0.242 W/kg |
| Body SAR (EU) | - | 0.86 W/kg |
| Head SAR (India) | 0.962 W/kg | 0.468 W/kg |
| Body SAR (India) | 0.838 W/kg | - |
Additional features
Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.
| Additional features | M1901F7I - SAR (Specific Absorption Rate) India: head - 0.962 W/kg; body - 0.838 W/kg | - |
| Xiaomi Redmi Note 7 India | Samsung Galaxy M21 2021 |