Comparison between:
- Xiaomi Redmi Note 8 2021
- Xiaomi Redmi Note 8
- Xiaomi Redmi 7
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Xiaomi Redmi Note 8 2021 | Xiaomi Redmi Note 8 | Xiaomi Redmi 7 | |
 |  |  | |
| Model alias | Redmi Note8 2021 | Redmi Note8 Red Rice Note 8 Red Rice Note8 C3J M1908C3JH M1908C3JG M1908C3JI | Redmi7 Red Rice 7 Red Rice7 |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 75.3 mm 7.53 cm 0.247 ft 2.965 in | 75.3 mm 7.53 cm 0.247 ft 2.965 in | 75.58 mm 7.558 cm 0.248 ft 2.976 in |
| Height | 158.3 mm 15.83 cm 0.519 ft 6.232 in | 158.3 mm 15.83 cm 0.519 ft 6.232 in | 158.73 mm 15.873 cm 0.521 ft 6.249 in |
| Thickness | 8.35 mm 0.835 cm 0.027 ft 0.329 in | 8.35 mm 0.835 cm 0.027 ft 0.329 in | 8.47 mm 0.847 cm 0.028 ft 0.333 in |
| Weight | 190 g 0.42 lbs 6.7 oz | 190 g 0.42 lbs 6.7 oz | 180 g 0.4 lbs 6.35 oz |
| Volume | 99.53 cm³ 6.04 in³ | 99.53 cm³ 6.04 in³ | 101.61 cm³ 6.17 in³ |
| Colors | Black Dark Blue Light Blue | Meteorite Black Dream Blue White Nebula Purple | Red Black Blue |
| Body materials | Plastic Glass | Aluminium alloy Plastic | Plastic |
| Certification | - | IP52 | - |
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 |
| Number of SIM cards | 2 | 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 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 |
| CDMA | CDMA 800 MHz (BC0) | CDMA 800 MHz (BC0) | CDMA 800 MHz |
| W-CDMA | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 2100 MHz (B1) | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 2100 MHz (B1) | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz |
| TD-SCDMA | TD-SCDMA 1900 MHz TD-SCDMA 2000 MHz | TD-SCDMA 1900 MHz TD-SCDMA 2000 MHz | TD-SCDMA 1900 MHz TD-SCDMA 2000 MHz |
| LTE | 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 1900 МНz (В39) LТЕ-ТDD 2000 МНz (В34) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2600 МНz (В38) | 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 1900 МНz (В39) LТЕ-ТDD 2000 МНz (В34) LТЕ-ТDD 2300 МНz (В40) LТЕ-ТDD 2600 МНz (В38) | LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2000 МНz (В34) 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 |
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 GРRS LТЕ Саt 12 | 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 12.5 (Аndrоid 11) | МΙUΙ V10 (Аndrоid 9.0 Рiе) МΙUΙ V11 (Аndrоid 9.0 Рiе) МΙUΙ V12 (Аndrоid 10) | МΙUΙ V10 (Аndrоid 9.0 Рiе) |
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 G85 (МТ6769Ζ) | Quаlсоmm Snарdrаgоn 665 (SМ6125) | Quаlсоmm Snарdrаgоn 632 (SDМ632) |
| Process technology | 12 nm | 11 nm | 14 nm |
| CPU | 2х 2.0 GНz АRМ Соrtех-А75, 6х 1.8 GНz АRМ Соrtех-А55 | 4х 2.0 GНz АRМ Соrtех-А73, 4х 1.8 GНz АRМ Соrtех-А53 (Κryо 260) | 4х 1.8 GНz АRМ Соrtех-А73, 4х 1.8 GНz АRМ Соrtех-А53 (Κryо 250) |
| CPU bits | 64 bit | 64 bit | 64 bit |
| Instruction set | ARMv8.2-A | ARMv8-A | ARMv8-A |
| Level 1 cache memory (L1) | 16 KB + 16 KB | 16 KB + 16 KB | 16 KB + 16 KB |
| CPU cores | 8 | 8 | 8 |
| CPU frequency | 2000 MHz | 2000 MHz | 1800 MHz |
| GPU | ARM Mali-G52 2EEMC2 | Qualcomm Adreno 610 | Qualcomm Adreno 506 |
| GPU cores | 2 | - | - |
| GPU frequency | 1000 MHz | 950 MHz | 725 MHz |
| RAM capacity | 4 GB | 4 GB 6 GB | 2 GB 3 GB 4 GB |
| RAM type | LPDDR4X | LPDDR4X | LPDDR4 |
| RAM channels | Double channel | Double channel | Single channel |
| RAM frequency | 1700 MHz | 1999 MHz | 1066 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 64 GB 128 GB | 64 GB 128 GB | 16 GB 32 GB 64 GB |
| - | eMMC 5.1 | 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 |
Display
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 | 6.3 in 160.02 mm 16 cm | 6.3 in 160.02 mm 16 cm | 6.26 in 159 mm 15.9 cm |
| Width | 2.82 in 71.56 mm 7.16 cm | 3.01 in 76.52 mm 7.65 cm | 2.57 in 65.25 mm 6.52 cm |
| Height | 5.63 in 143.13 mm 14.31 cm | 5.53 in 140.54 mm 14.05 cm | 5.71 in 145 mm 14.5 cm |
| Aspect ratio | 2:1 2:1 (18:9) | 1.837:1 | 2.222:1 |
| Resolution | 1080 x 2160 pixels | 1176 x 2160 pixels | 1080 x 2400 pixels |
| Pixel density | 383 ppi 150 ppcm | 390 ppi 153 ppcm | 420 ppi 165 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 86.21 % | 90.51 % | 79.12 % |
| Other features | Capacitive Scratch resistant | Capacitive Scratch resistant | Capacitive Multi-touch Scratch resistant |
| 2.5D curved glass screen Corning Gorilla Glass 5 1500:1 contrast ratio 84% NTSC | 2.5D curved glass screen Corning Gorilla Glass 5 TÜV Rheinland certification for low blue light emissions 1500:1 contrast ratio 84% NTSC | Corning Gorilla Glass 5 2.5D curved glass screen LTPS (Low Temperature PolySilicon) 1500:1 contrast ratio 84% NTSC |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Gyroscope | Proximity Light Accelerometer Gyroscope | Proximity Light Accelerometer Compass Gyroscope |
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 | Samsung S5KGM2 | Samsung S5KGM1 | - |
| Sensor type | ISOCELL | ISOCELL | CMOS |
| Sensor format | 1/2.25" | 1/2.25" | - |
| Pixel size | 0.8 µm 0.000800 mm | 0.8 µm 0.000800 mm | 1.25 µm 0.001250 mm |
| Aperture | f/1.79 | f/1.79 | f/2.2 |
| Focal length and 35 mm equivalent | 13 mm *(35 mm / full frame) | 13 mm *(35 mm / full frame) | - |
| Field of view | 79.4 ° | 79.4 ° | - |
| Number of lenses | 6 | 6 | - |
| Flash type | LED | LED | Dual LED |
| Image resolution | 8000 x 6000 pixels 48 MP | 8000 x 6000 pixels 48 MP | 4032 x 3024 pixels 12.19 MP |
| Video resolution | 3840 x 2160 pixels 8.29 MP | 3840 x 2160 pixels 8.29 MP | 1920 x 1080 pixels 2.07 MP |
| Video FPS | 30 fps | 30 fps | 60 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 Macro mode Phase detection autofocus (PDAF) | Autofocus Digital 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 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 |
| Pixel size - 1.6 μm (4-in-1 pixel binning) Sensor type - ISOCELL PLUS Super Phase Detection 1080p @ 120 fps 720p @ 240 fps Samsung S5KGM1 is also available | Pixel size - 1.6 μm (4-in-1 pixel binning) Sensor type - ISOCELL PLUS Super Phase Detection 1080p @ 120 fps 720p @ 240 fps Samsung S5KGM1 is also available | 720p @ 120 fps Secondary rear camera - 2 MP |
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" | 1/4" | - |
| Pixel size | 1.12 µm 0.001120 mm | 1.12 µm 0.001120 mm | - |
| Aperture | f/2.2 | f/2.2 | - |
| Field of view | 120 ° | 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.
| Sensor format | 1/5" | 1/5" | - |
| Pixel size | 1.75 µm 0.001750 mm | 1.75 µm 0.001750 mm | - |
| Aperture | f/2.4 | f/2.4 | - |
| Image resolution | 2 MP | 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 format | 1/5" | 1/5" | - |
| Pixel size | 1.75 µm 0.001750 mm | 1.75 µm 0.001750 mm | - |
| Aperture | f/2.4 | f/2.4 | - |
| Image resolution | 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 OV13855 | OmniVision OV13855 | - |
| Sensor type | PureCel | PureCel | - |
| Sensor size | 4.75 x 3.54 mm 0.23 in | 4.75 x 3.54 mm 0.23 in | - |
| Pixel size | 1.12 µm 0.001120 mm | 1.12 µm 0.001120 mm | - |
| Crop factor | 7.31 | 7.31 | - |
| Aperture | f/2 | f/2 | - |
| Focal length and 35 mm equivalent | 3.86 mm 28.21 mm *(35 mm / full frame) | 3.86 mm 28.21 mm *(35 mm / full frame) | - |
| Image resolution | 4480 x 2957 pixels 13.25 MP | 4608 x 2875 pixels 13.25 MP | 3648 x 2190 pixels 7.99 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 | Face unlock | Face unlock | Face unlock |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece Stereo speakers | Loudspeaker Earpiece | Loudspeaker Earpiece |
| Smart PA Stereo speakers model - 1217SLS | Smart PA 1217 ultra-linear speaker | Smart PA |
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 | GРS А-GРS GLОΝАSS | GРS А-GРS GLОΝАSS |
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 802.11ас 5GНz | 802.11b 802.11g Wi-Fi Disрlаy 802.11а 802.11ас 5GНz 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 | 4.2 |
| Features | A2DP EDR HID LE | A2DP EDR HID 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 | USB Type-C | USB Type-C |
| Version | 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 |
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 Infrared Tethering 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 LDAC | AAC AAC+ AMR AMR-WB eAAC+ FLAC MIDI MP3 OGG WMA WAV LDAC | AAC AAC+ AMR AMR-WB 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/codecs | 3GPP AVI DivX H.263 H.264 H.265 MKV MP4 VC-1 Xvid | 3GPP AVI DivX H.263 H.264 H.265 MKV MP4 VC-1 Xvid | 3GPP AVI DivX H.263 H.264 H.265 MKV MP4 VC-1 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 | 4000 mAh | 4000 mAh |
| Type | Li-Ion | Li-Ion | Li-Polymer |
| 2G talk time | - | - | 27 h 1620 min 1.1 days |
| 2G stand-by time | - | - | 400 h 24000 min 16.7 days |
| 3G talk time | - | - | 27 h 1620 min 1.1 days |
| 3G stand-by time | - | - | 400 h 24000 min 16.7 days |
| Charger output power | 9 V / 2 A | 9 V / 2 A | 5 V / 2 A |
| Quick charge technology | Qualcomm Quick Charge 4.0 | Qualcomm Quick Charge 4.0 | - |
| Features | Fast charging Non-removable | Fast charging Non-removable | Non-removable |
| 22.5W charger in the box | - | - |
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) | - | - | 0.327 W/kg |
| Body SAR (EU) | 0.764 W/kg | 0.644 W/kg | 0.981 W/kg |
| Head SAR (USA) | 0.064 W/kg | - | 0.79 W/kg |
| Body SAR (USA) | 0.757 W/kg | 0.617 W/kg | 0.79 W/kg |
| Head SAR (India) | - | 1.13 W/kg | 1.031 W/kg |
| Body SAR (India) | - | 0.634 W/kg | 0.573 W/kg |
Additional features
Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.
| Additional features | M1908C3JG - SAR (Specific Absorption Rate) EU: head - 0.191 W/kg; body - 1.034 W/kg M1908C3JG - SAR (Specific Absorption Rate) US: head - 0.374 W/kg; body - 0.987 W/kg M1908C3JH - SAR (Specific Absorption Rate) EU: head - 0.191 W/kg; body - 1.089 W/kg M1908C3JH - SAR (Specific Absorption Rate) US: head - 0.387 W/kg; body - 1.056 W/kg Anti-splash coating | M1908C3JG - SAR (Specific Absorption Rate) EU: head - 0.191 W/kg; body - 1.034 W/kg M1908C3JG - SAR (Specific Absorption Rate) US: head - 0.374 W/kg; body - 0.987 W/kg M1908C3JH - SAR (Specific Absorption Rate) EU: head - 0.191 W/kg; body - 1.089 W/kg M1908C3JH - SAR (Specific Absorption Rate) US: head - 0.387 W/kg; body - 1.056 W/kg Anti-splash coating | M1810F6LI - SAR (Specific Absorption Rate) India: head - 1.031 W/kg; body - 0.573 W/kg P2i nano-coating |
| Xiaomi Redmi Note 8 2021 | Xiaomi Redmi Note 8 | Xiaomi Redmi 7 |