Comparison between:
- Xiaomi Redmi 2
- Samsung Galaxy A3 (2017)
- Google Pixel 3
- Samsung Galaxy S20 SD865
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Xiaomi Redmi 2 | Samsung Galaxy A3 (2017) | Google Pixel 3 | Samsung Galaxy S20 SD865 | |
 |  |  |  | |
| Model alias | Hongmi 2 | SM-A320F A320F | Pixel3 | SM-G980 SM-G980F SM-G980F/DS |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 67.2 mm 6.72 cm 0.22 ft 2.646 in | 66.2 mm 6.62 cm 0.217 ft 2.606 in | 68.2 mm 6.82 cm 0.224 ft 2.685 in | 69.1 mm 6.91 cm 0.227 ft 2.72 in |
| Height | 134 mm 13.4 cm 0.44 ft 5.276 in | 135.4 mm 13.54 cm 0.444 ft 5.331 in | 145.6 mm 14.56 cm 0.478 ft 5.732 in | 151.7 mm 15.17 cm 0.498 ft 5.972 in |
| Thickness | 9.4 mm 0.94 cm 0.031 ft 0.37 in | 7.9 mm 0.79 cm 0.026 ft 0.311 in | 7.9 mm 0.79 cm 0.026 ft 0.311 in | 7.9 mm 0.79 cm 0.026 ft 0.311 in |
| Weight | 133 g 0.29 lbs 4.69 oz | 138 g 0.3 lbs 4.87 oz | 148 g 0.33 lbs 5.22 oz | 163 g 0.36 lbs 5.75 oz |
| Volume | 84.65 cm³ 5.14 in³ | 70.81 cm³ 4.3 in³ | 78.45 cm³ 4.76 in³ | 82.81 cm³ 5.03 in³ |
| Colors | White Yellow Green Pink Gray | Black Blue Gold Rose-gold | Black White Not pink | Cosmic Grey Cloud Blue Cloud Pink |
| Body materials | Plastic | Aluminium alloy Glass | Aluminium alloy Glass | Glass Aluminium alloy |
| Certification | - | IP68 | IP68 | IP68 |
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 Micro-SIM | Nano-SIM eSIM | Nano-SIM eSIM |
| Number of SIM cards | 2 | 1 | 1 | 1 |
| Features | - | Dual SIM optional (A variant of the model with two SIM card slots is available) | - | 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 900 МНz GSМ 1900 МНz | 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 1900 MHz CDMA 800 MHz (B10) | - |
| CDMA2000 | 1xEV-DO Rev. A | - | - | - |
| TD-SCDMA | TD-SCDMA 1900 MHz TD-SCDMA 2000 MHz | - | - | - |
| UMTS | UМТS 1900 МНz UМТS 2100 МНz UМТS 900 МНz (Rеdmi 2 Рrimе) | UМТS 900 МНz UМТS 1900 МНz UМТS 2100 МНz | UМТS 900 МНz UМТS 1700/2100 МНz UМТS 1900 МНz UМТS 2100 МНz | UМТS 900 МНz (В8) UМТS 1700 МНz (В4) UМТS 1900 МНz (В2) UМТS 2100 МНz (В1) |
| LTE | LТЕ 2100 МНz LТЕ 2600 МНz LТЕ-ТDD 1900 МНz (В39) LТЕ-ТDD 2500 МНz (В41) LТЕ-ТDD 2600 МНz (В38) LТЕ-ТDD 2300 МНz (В40) (Rеdmi 2 Рrimе) | LТЕ 800 МНz LТЕ 850 МНz LТЕ 900 МНz LТЕ 1800 МНz LТЕ 2100 МНz LТЕ-ТDD 2300 МНz (В40) | LТЕ 700 МНz Сlаss 13 LТЕ 700 МНz Сlаss 17 LТЕ 800 МНz LТЕ 850 МНz LТЕ 900 МНz LТЕ 1700/2100 МНz LТЕ 1800 МНz LТЕ 1900 МНz LТЕ 2100 МНz LТЕ 2600 МНz LТЕ 700 МНz (В12) LТЕ 800 МНz (В18) LТЕ 800 МНz (В19) LТЕ 1900 МНz (В25) LТЕ 850 МНz (В26) LТЕ 700 МНz (В28) LТЕ 700 МНz (В29) LТЕ 1500 МНz (В32) LТЕ 600 МНz (В71) | LТЕ-FDD 700 МНz (В12) LТЕ-FDD 700 МНz (В13) LТЕ-FDD 700 МНz (В17) 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 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 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 4 | UМТS GРRS LТЕ Саt 6 | UМТS GРRS LТЕ Саt 16 | UМТS GРRS LТЕ Саt 20 |
| - | - | - | Enhanced 4x4 MIMO Up to 7CA LAA (US only) |
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 V6 (Аndrоid 4.4.4 ΚitΚаt) МΙUΙ V7.2 (Аndrоid 4.4.х ΚitΚаt) МΙUΙ V9 | Аndrоid 6.0.1 Маrshmаllоw Аndrоid 7.0 Νоugаt Аndrоid 8.0 Оrео | Аndrоid 8.1 Оrео | Аndrоid 10 |
| User interface (UI) | - | Grace UX | - | 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 410 (МSМ8916) | Sаmsung Ехynоs 7 Осtа 7870 | Quаlсоmm Snарdrаgоn 845 (SDМ845) | Quаlсоmm Snарdrаgоn 865 (SМ8250) |
| Process technology | 28 nm | 14 nm | 10 nm | 7 nm |
| CPU | 4х 1.2 GНz АRМ Соrtех-А53 | 8х 1.6 GНz АRМ Соrtех-А53 | 4х 2.8 GНz АRМ Соrtех-А75, 4х 1.8 GНz АRМ Соrtех-А55 (Κryо 385) | 1х 2.84 GНz АRМ Соrtех-А77, 3х 2.42 GНz АRМ Соrtех-А77, 4х 1.8 GНz АRМ Соrtех-А55 (Κryо 585) |
| CPU bits | 32 bit | 64 bit | 64 bit | 64 bit |
| Instruction set | ARMv7 | ARMv8-A | ARMv8.2-A | ARMv8.2-A |
| Level 0 cache memory (L0) | 4 KB + 4 KB | - | - | - |
| Level 1 cache memory (L1) | 32 KB + 32 KB | 16 KB + 16 KB | 16 KB + 16 KB | 16 KB + 16 KB |
| Level 2 cache memory (L2) | 2048 KB 2 MB | - | 1536 KB 1.5 MB | 1792 KB 1.75 MB |
| Level 3 cache memory (L3) | - | - | 2048 KB 2 MB | 4096 KB 4 MB |
| CPU cores | 4 | 8 | 8 | 8 |
| CPU frequency | 1200 MHz | 1600 MHz | 2800 MHz | 2840 MHz |
| GPU | Qualcomm Adreno 306 | ARM Mali-T830 MP1 | Qualcomm Adreno 630 | Qualcomm Adreno 650 |
| GPU cores | - | 1 | - | - |
| GPU frequency | 400 MHz | 700 MHz | 710 MHz | 587 MHz |
| RAM capacity | 1 GB 2 GB | 2 GB | 4 GB | 8 GB |
| RAM type | LPDDR2/LPDDR3 | LPDDR4 | LPDDR4X | LPDDR5 |
| RAM channels | Single channel | Single channel | Double channel | Quad channel |
| RAM frequency | 666 MHz | 1066 MHz | 1766 MHz | 2883 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 8 GB 16 GB | 16 GB | 64 GB 128 GB | 128 GB |
| UFS 2.1 | UFS 2.1 | - | 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 | - | 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 | OLED | Dynamic AMOLED 2X |
| Diagonal size | 4.7 in 119.38 mm 11.94 cm | 4.7 in 119.38 mm 11.94 cm | 5.5 in 139.7 mm 13.97 cm | 6.2 in 157.48 mm 15.75 cm |
| Width | 1.93 in 48.99 mm 4.9 cm | 2.04 in 51.73 mm 5.17 cm | 2.26 in 57.33 mm 5.73 cm | 2.96 in 75.3 mm 7.53 cm |
| Height | 4.29 in 108.87 mm 10.89 cm | 4.24 in 107.59 mm 10.76 cm | 5.02 in 127.4 mm 12.74 cm | 5.45 in 138.31 mm 13.83 cm |
| Aspect ratio | 2.222:1 | 2.08:1 | 2.222:1 | 1.837:1 |
| Resolution | 1080 x 2400 pixels | 1080 x 2246 pixels | 1080 x 2400 pixels | 1176 x 2160 pixels |
| Pixel density | 560 ppi 220 ppcm | 530 ppi 208 ppcm | 479 ppi 188 ppcm | 397 ppi 156 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 59.42 % | 62.3 % | 73.79 % | 99.68 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant |
| Dragontrail glass | Corning Gorilla Glass 4 | Display manufacturer - LG Display Corning Gorilla Glass 5 Always-On Display 100000:1 contrast ratio 100% DCI-P3 HDR | Corning Gorilla Glass 6 Infinity-O Display Always-On Display 120Hz refresh rate HDR10+ |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Compass | Proximity Light Accelerometer Compass Fingerprint | Proximity Light Accelerometer Compass Gyroscope Barometer Fingerprint | Proximity Light Accelerometer Compass Gyroscope Barometer Geomagnetic Fingerprint |
| - | - | Fingerprint sensor model - Fingerprint Cards FPC1075 | In-display ultrasonic 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 | OmniVision OV8825 | - | Sony IMX363 Exmor RS | Sony IMX555 |
| Sensor type | CMOS BSI | CMOS BSI | CMOS | CMOS |
| Sensor size | 4.61 x 3.44 mm 0.23 in | - | - | 6.45 x 8.46 mm 0.42 in |
| Sensor format | - | - | 1/2.55" | 1/1.76" |
| Pixel size | 1.414 µm 0.001414 mm | - | 1.4 µm 0.001400 mm | 1.8 µm 0.001800 mm |
| Crop factor | 7.51 | - | - | 4.07 |
| Aperture | f/2.2 | f/1.9 | f/1.8 | f/1.8 |
| Focal length and 35 mm equivalent | 3.73 mm 28.01 mm *(35 mm / full frame) | 3.6 mm | 4.44 mm 27 mm *(35 mm / full frame) | 4.32 mm 17.57 mm *(35 mm / full frame) |
| Field of view | - | - | 76 ° | 79 ° |
| Number of lenses | 5 | - | - | - |
| Flash type | LED | LED | Dual LED | Dual LED |
| Image resolution | 3264 x 2448 pixels 7.99 MP | 4128 x 3096 pixels 12.78 MP | 4032 x 3024 pixels 12.19 MP | 4032 x 3024 pixels 12.19 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 3840 x 2160 pixels 8.29 MP | 7680 x 4320 pixels 33.18 MP |
| Video FPS | 30 fps | 30 fps | 30 fps | 24 fps |
| Features | Autofocus Continuous shooting Digital zoom Geotagging HDR Touch focus Face detection White balance settings ISO settings Exposure compensation Scene mode | 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 Optical 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 Optical 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 Phase detection autofocus (PDAF) |
| - | - | Phase detection with Dual Pixel 1080p @ 120 fps 720p @ 240 fps | Phase detection with Dual Pixel Object tracking AF Dual OIS 2160p @ 60 fps 1080p @ 240 fps 720p @ 960 fps HDR10+ video recording |
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 model | - | - | - | Samsung S5K2LA |
| Sensor format | - | - | - | 1/2.55" |
| Pixel size | - | - | - | 1.4 µm 0.001400 mm |
| Aperture | - | - | - | f/2.2 |
| Focal length equivalent (35 mm) | - | - | - | 13 mm *(35 mm / full frame) |
| Field of view | - | - | - | 120 ° |
| Image resolution | - | - | - | 12 MP |
Telephoto camera
Specifications of the telephoto camera. These cameras are used to capture distant objects by using optical zoom to make them look closer without losing resolution and detail.
| Sensor model | - | - | - | Samsung S5KGW2 |
| Sensor format | - | - | - | 1/1.72" |
| Aperture | - | - | - | f/2 |
| Focal length equivalent (35 mm) | - | - | - | 29 mm *(35 mm / full frame) |
| Field of view | - | - | - | 76 ° |
| Optical zoom | - | - | - | 3 x |
| Image resolution | - | - | - | 64 MP |
| Features | - | - | - | Phase detection autofocus (PDAF) Optical image stabilization |
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 | - | - | Sony IMX355 Exmor | Sony IMX374 |
| Sensor type | - | - | CMOS | CMOS |
| Sensor format | - | - | 1/3.2" | 1/3.33" |
| Pixel size | - | - | 1.4 µm 0.001400 mm | - |
| Aperture | - | f/1.9 | f/1.8 | f/2.2 |
| Focal length and 35 mm equivalent | - | 2.91 mm | 2.97 mm 28 mm *(35 mm / full frame) | 26 mm *(35 mm / full frame) |
| Field of view | - | - | 75 ° | 80 ° |
| Image resolution | 1600 x 1200 pixels 1.92 MP | 3648 x 2190 pixels 7.99 MP | 3520 x 2270 pixels 7.99 MP | 10 MP |
| Video resolution | 1280 x 720 pixels 0.92 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 | 60 fps |
| Features | - | - | Phase detection autofocus (PDAF) | Phase detection autofocus (PDAF) HDR Autofocus |
| - | - | OIS Aperture size - f/2.2 (#2) Focal length (35 mm equivalent) - 19 mm (#2) Angle of view - 97° (#2) Secondary front camera - 8 MP | Phase detection with Dual Pixel Auto HDR |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece Stereo speakers | Loudspeaker Earpiece Stereo speakers |
| - | - | HAC (M3/T3) - Hearing Aid Compatibility Headphone adapter | 384 kHz / 32-bit AKG audio Dolby Atmos |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | Yes | No | Yes |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GРS А-GРS GLОΝАSS | GРS А-GРS GLОΝАSS | GРS А-GРS | 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 | 802.11b 802.11g Wi-Fi Disрlаy 802.11а 802.11ас 5GНz 802.11аd | 802.11а 802.11b 802.11g 802.11а 802.11ас 5GНz 802.11аd | 802.11а 802.11b 802.11g 802.11а | 802.11а 802.11b 802.11g Wi-Fi 6 (802.11ах) Wi-Fi Disрlаy 802.11а 802.11ас 5GНz 802.11аd |
| - | - | 2x2 MiMO | HE80 MiMO 1024-QAM |
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
| Version | 4.1 | 4.2 | 5.0 | 5.0 |
| Features | A2DP | A2DP AVRCP DIP HFP HID HSP MAP OPP PAN PBAP HOGP | A2DP LE | A2DP AVRCP DIP HFP HID HSP LE MAP OPP PAN PBAP |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | USB Type-C | USB Type-C | Micro USB | USB Type-C |
| Version | 2.0 | 2.0 | 3.1 | 3.2 |
| Features | Charging Mass storage On-The-Go | Charging Mass storage On-The-Go | 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 | Yes | Yes | No | No |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Tethering | Computer sync OTA sync Tethering NFC ANT+ | Computer sync OTA sync Tethering DLNA NFC | Computer sync OTA sync Tethering NFC ANT+ |
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 AMR eAAC+ MIDI MP3 WMA WAV | AAC AMR AMR-WB eAAC+ FLAC M4A MIDI MP3 OGG WMA WAV | AAC AAC+ AMR AMR-WB aptX aptX HD eAAC+ FLAC M4A MIDI MP3 OGG WMA WAV LDAC | AAC AMR FLAC M4A MIDI MP3 OGG WMA WAV 3GA OGA AWB MID XMF MXMF IMY RTTTL RTX OTA APE DSF DFF |
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 MP4 WMV | 3GPP 3GPP2 AVI Flash Video H.263 H.264 H.265 MKV MP4 VC-1 VP8 VP9 WebM WMV WMV7 WMV8 Xvid | 3GPP AVI DivX Flash Video H.263 H.264 H.265 MKV QuickTime MP4 VC-1 VP8 WebM WMV Xvid | AVI MKV MP4 WMV M4V 3GP 3G2 ASF FLV WEBM |
Battery
The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.
| Capacity | 2200 mAh | 2350 mAh | 2915 mAh | 4000 mAh |
| Type | Li-Ion | Li-Polymer | Li-Ion | Li-Polymer |
| 2G talk time | - | 17 h 1020 min 0.7 days | - | - |
| 3G talk time | - | 17 h 1020 min 0.7 days | - | - |
| Charger output power | - | - | 5 V / 3 A 9 V / 2 A | 5 V / 5 A |
| Quick charge technology | Qualcomm Quick Charge 1.0 | - | - | - |
| Features | Fast charging Removable | Non-removable | Wireless charging Fast charging Non-removable | Wireless charging Fast charging Non-removable |
| - | - | Qi wireless charging - 10 W | Qi/PMA wireless charging - 15 W Wireless reverse charging - 9 W Fast Wireless Charging 2.0 USB Power Delivery 3.0 |
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) | 0.451 W/kg | 0.599 W/kg | 1 W/kg | - |
| Body SAR (EU) | 0.433 W/kg | 1.53 W/kg | 1.1 W/kg | 1.135 W/kg |
| Head SAR (USA) | 0.689 W/kg | 0.975 W/kg | 0.91 W/kg | 0.33 W/kg |
| Body SAR (USA) | 0.752 W/kg | 0.93 W/kg | 0.97 W/kg | 0.64 W/kg |
Additional features
Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.
| Additional features | - | - | - | Samsung DeX |
| Xiaomi Redmi 2 | Samsung Galaxy A3 (2017) | Google Pixel 3 | Samsung Galaxy S20 SD865 |
