Comparison between:
- Xiaomi Redmi Note 15 4G
- Xiaomi Redmi Note 8 2021
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Xiaomi Redmi Note 15 4G | Xiaomi Redmi Note 8 2021 | |
 |  | |
| Model alias | 2510DRA23E 2510DRA23G | Redmi Note8 2021 |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 75.4 mm 7.54 cm 0.247 ft 2.969 in | 75.3 mm 7.53 cm 0.247 ft 2.965 in |
| Height | 164 mm 16.4 cm 0.538 ft 6.457 in | 158.3 mm 15.83 cm 0.519 ft 6.232 in |
| Thickness | 7.9 mm 0.79 cm 0.026 ft 0.311 in | 8.35 mm 0.835 cm 0.027 ft 0.329 in |
| Weight | 183 g 0.4 lbs 6.48 oz | 190 g 0.42 lbs 6.7 oz |
| Volume | 97.69 cm³ 5.93 in³ | 99.53 cm³ 6.04 in³ |
| Colors | Black Forest Green Glacier Blue Purple | Black Dark Blue Light Blue |
| Body materials | Plastic Glass | Plastic Glass |
| Certification | IP64 | - |
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 Micro-SIM | 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) | 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 1800 МНz (В3) | GSМ 850 МНz (В5) GSМ 900 МНz (В8) GSМ 1900 МНz (В2) |
| CDMA | - | CDMA 800 MHz (BC0) |
| W-CDMA | W-CDMA 850 MHz (B5) W-CDMA 850 MHz (B6) W-CDMA 900 MHz (B8) W-CDMA 900 MHz (B19) W-CDMA 2100 MHz (B1) | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 2100 MHz (B1) |
| TD-SCDMA | - | TD-SCDMA 1900 MHz TD-SCDMA 2000 MHz |
| LTE | LТЕ-FDD 700 МНz (В28) LТЕ-FDD 850 МНz (В5) LТЕ-FDD 850 МНz (В19) LТЕ-FDD 900 МНz (В8) LТЕ-FDD 1700 МНz (В66) LТЕ-FDD 1800 МНz (В3) LТЕ-FDD 1900 МНz (В25) LТЕ-FDD 2100 МНz (В1) 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) |
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 | UМТS GРRS LТЕ Саt 12 |
Operating system
Operating system is the system software, which manages and controls the functioning of the hardware components of the device.
| Operating system (OS) | Хiаоmi НyреrОS 2.0 (Аndrоid 15) | МΙUΙ 12.5 (Аndrоid 11) |
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 G100 (МТ6789Н) | МеdiаТеk Неliо G85 (МТ6769Ζ) |
| Process technology | 6 nm | 12 nm |
| CPU | 2х 2.2 GНz АRМ Соrtех-А76, 6х 2.0 GНz АRМ Соrtех-А55 | 2х 2.0 GНz АRМ Соrtех-А75, 6х 1.8 GНz АRМ Соrtех-А55 |
| CPU bits | 64 bit | 64 bit |
| Instruction set | ARMv8.2-A | ARMv8.2-A |
| Level 1 cache memory (L1) | 16 KB + 16 KB | 16 KB + 16 KB |
| CPU cores | 8 | 8 |
| CPU frequency | 2200 MHz | 2000 MHz |
| GPU | ARM Mali-G57 MC2 | ARM Mali-G52 2EEMC2 |
| GPU cores | 2 | 2 |
| GPU frequency | 1000 MHz | 1000 MHz |
| RAM capacity | 6 GB 8 GB | 4 GB |
| RAM type | LPDDR4X | LPDDR4X |
| RAM channels | Double channel | Double channel |
| RAM frequency | 2266 MHz | 1700 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 128 GB 256 GB 512 GB | 64 GB 128 GB |
| UFS 2.1 | - |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | 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 | OLED | IPS |
| Diagonal size | 6.77 in 171.96 mm 17.2 cm | 6.3 in 160.02 mm 16 cm |
| Width | 2.93 in 74.52 mm 7.45 cm | 2.82 in 71.56 mm 7.16 cm |
| Height | 6.1 in 154.97 mm 15.5 cm | 5.63 in 143.13 mm 14.31 cm |
| Aspect ratio | 2.08:1 | 2:1 2:1 (18:9) |
| Resolution | 1080 x 2246 pixels | 1080 x 2160 pixels |
| Pixel density | 368 ppi 144 ppcm | 383 ppi 150 ppcm |
| Color depth | 36 bit 68719476736 colors | 24 bit 16777216 colors |
| Display area | 93.69 % | 86.21 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Scratch resistant |
| 3D curved glass screen 120 Hz refresh rate 240 Hz touch sampling rate 3200 cd/m² peak brightness 2560 Hz PWM dimming | 2.5D curved glass screen Corning Gorilla Glass 5 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 Compass Gyroscope Magnetometer | Proximity Light Accelerometer Gyroscope |
| 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 | - | Samsung S5KGM2 |
| Sensor type | CMOS | ISOCELL |
| Sensor format | 1/1.67" | 1/2.25" |
| Pixel size | 0.64 µm 0.000640 mm | 0.8 µm 0.000800 mm |
| Aperture | f/1.7 | f/1.79 |
| Focal length and 35 mm equivalent | 24 mm *(35 mm / full frame) | 13 mm *(35 mm / full frame) |
| Field of view | - | 79.4 ° |
| Number of lenses | - | 6 |
| Flash type | Dual LED | LED |
| Image resolution | 12000 x 9000 pixels 108 MP | 8000 x 6000 pixels 48 MP |
| Video resolution | 3840 x 2160 pixels 8.29 MP | 3840 x 2160 pixels 8.29 MP |
| Video FPS | 30 fps | 30 fps |
| Features | 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 | 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) |
| - | 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 |
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 |
| 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.
| Sensor format | - | 1/5" |
| Pixel size | - | 1.75 µm 0.001750 mm |
| 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.
| Sensor format | - | 1/5" |
| Pixel size | - | 1.75 µm 0.001750 mm |
| 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 | - | OmniVision OV13855 |
| Sensor type | CMOS BSI | PureCel |
| Sensor size | - | 4.75 x 3.54 mm 0.23 in |
| Sensor format | 1/4" | - |
| Pixel size | 0.7 µm 0.000700 mm | 1.12 µm 0.001120 mm |
| Crop factor | - | 7.31 |
| Aperture | f/2.2 | f/2 |
| Focal length and 35 mm equivalent | - | 3.86 mm 28.21 mm *(35 mm / full frame) |
| Image resolution | 20 MP | 4480 x 2957 pixels 13.25 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 detection | Face unlock |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece Stereo speakers | Loudspeaker Earpiece Stereo speakers |
| Dolby Atmos | Smart PA Stereo speakers model - 1217SLS |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | No | Yes |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GРS А-GРS GLОΝАSS | 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 802.11аd | 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 | 5.2 | 4.2 |
| Features | A2DP LE | A2DP EDR HID LE |
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 |
| Version | 2.0 | 2.0 |
| Features | Charging 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 | No | Yes |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Infrared Tethering NFC 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 |
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 AMR aptX eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AAC+ AMR AMR-WB eAAC+ FLAC MIDI MP3 OGG WMA WAV LDAC |
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 MKV QuickTime MP4 WebM WMV 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 | 6000 mAh | 4000 mAh |
| Type | Li-Polymer | Li-Ion |
| Charger output power | 11 V / 3 A | 9 V / 2 A |
| Quick charge technology | - | Qualcomm Quick Charge 4.0 |
| Features | Fast charging Non-removable | Fast charging Non-removable |
| 18W reverse wired charging | 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.
| Body SAR (EU) | - | 0.764 W/kg |
| Head SAR (USA) | - | 0.064 W/kg |
| Body SAR (USA) | - | 0.757 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 |
| Xiaomi Redmi Note 15 4G | Xiaomi Redmi Note 8 2021 |
