Comparison between:
- itel City 100
- Vivo Y31d
- Xiaomi Redmi Note 15 4G
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| itel City 100 | Vivo Y31d | Xiaomi Redmi Note 15 4G | |
 |  |  | |
| Model alias | - | - | 2510DRA23E 2510DRA23G |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 77.47 mm 7.747 cm 0.254 ft 3.05 in | 78.43 mm 7.843 cm 0.257 ft 3.088 in | 75.4 mm 7.54 cm 0.247 ft 2.969 in |
| Height | 167.69 mm 16.769 cm 0.55 ft 6.602 in | 166.64 mm 16.664 cm 0.547 ft 6.561 in | 164 mm 16.4 cm 0.538 ft 6.457 in |
| Thickness | 7.65 mm 0.765 cm 0.025 ft 0.301 in | 8.49 mm 0.849 cm 0.028 ft 0.334 in | 7.9 mm 0.79 cm 0.026 ft 0.311 in |
| Weight | 185 g 0.41 lbs 6.53 oz | 219 g 0.48 lbs 7.72 oz | 183 g 0.4 lbs 6.48 oz |
| Volume | 99.38 cm³ 6.04 in³ | 110.96 cm³ 6.74 in³ | 97.69 cm³ 5.93 in³ |
| Colors | Fairy Purple Pure Titanium Navy Blue | Glow White Starlight Gray | Black Forest Green Glacier Blue Purple |
| Body materials | Plastic Magnetic rear shell | Plastic | Plastic Glass |
| Certification | IP64 | IP68 IP69 | 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 Nano-SIM / microSD | Nano-SIM | Nano-SIM Nano-SIM / microSD |
| 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 1800 МНz (В3) | GSМ 850 МНz (В5) GSМ 1800 МНz (В3) |
| W-CDMA | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 1900 MHz (B2) W-CDMA 2100 MHz (B1) | W-CDMA 850 MHz (B5) W-CDMA 900 MHz (B8) W-CDMA 2100 MHz (B1) | 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) |
| LTE | LТЕ-FDD 700 МНz (В28) 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-FDD 700 МНz (В28) 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-ТDD 2300 МНz (В40) LТЕ-ТDD 2600 МНz (В38) | 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) |
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 | 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) | itеl ОS 14.5 (Аndrоid 14) | ОriginОS 6 (Аndrоid 16) | Хiаоmi НyреrОS 2.0 (Аndrоid 15) |
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 | Unisос Т7250 | Quаlсоmm Snарdrаgоn 6s 4G Gеn 2 | МеdiаТеk Неliо G100 (МТ6789Н) |
| Process technology | 12 nm | 4 nm | 6 nm |
| CPU | 2х 1.8 GНz АRМ Соrtех-А75, 6х 1.6 GНz АRМ Соrtех-А55 | 4х 2.9 GНz АRМ Соrtех-А73, 4х АRМ Соrtех-А53 | 2х 2.2 GНz АRМ Соrtех-А76, 6х 2.0 GНz АRМ Соrtех-А55 |
| CPU bits | 64 bit | 64 bit | 64 bit |
| Instruction set | ARMv8.2-A | ARMv8.2-A | ARMv8.2-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 | 1800 MHz | 2900 MHz | 2200 MHz |
| GPU | ARM Mali-G57 MP1 | Qualcomm Adreno | ARM Mali-G57 MC2 |
| GPU cores | 1 | - | 2 |
| GPU frequency | 850 MHz | - | 1000 MHz |
| RAM capacity | 4 GB 6 GB 8 GB | 6 GB | 6 GB 8 GB |
| RAM type | LPDDR4/LPDDR4X | LPDDR4X | LPDDR4X |
| RAM channels | Double channel | Double channel | Double channel |
| RAM frequency | 1766 MHz | 2266 MHz | 2033 MHz |
| Virtual RAM expansion - 16 Unisoc T7250 = Unisoc Tiger T615 | - | - |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 128 GB 256 GB | 128 GB 256 GB | 128 GB 256 GB 512 GB |
| UFS 2.0 | 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 | OLED |
| Diagonal size | 6.75 in 171.45 mm 17.15 cm | 6.75 in 171.45 mm 17.15 cm | 6.77 in 171.96 mm 17.2 cm |
| Width | 3.02 in 76.67 mm 7.67 cm | 2.83 in 71.85 mm 7.18 cm | 3.03 in 76.9 mm 7.69 cm |
| Height | 6.04 in 153.35 mm 15.33 cm | 6.13 in 155.67 mm 15.57 cm | 6.06 in 153.8 mm 15.38 cm |
| Aspect ratio | 2:1 2:1 (18:9) | 2.167:1 | 2:1 2:1 (18:9) |
| Resolution | 720 x 1440 pixels | 1080 x 2340 pixels | 720 x 1440 pixels |
| Pixel density | 239 ppi 93 ppcm | 382 ppi 150 ppcm | 238 ppi 93 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 36 bit 68719476736 colors |
| Display area | 90.8 % | 85.85 % | 95.96 % |
| Other features | Capacitive Multi-touch | Capacitive Multi-touch | Capacitive Multi-touch Scratch resistant |
| 2.5D curved glass screen 90 Hz 700 cd/m² peak brightness 83% NTSC 1500:1 | 2.5D curved glass screen 120 Hz refresh rate 83% NTSC 1250 cd/m² HBM | 3D curved glass screen 120 Hz refresh rate 240 Hz touch sampling rate 3200 cd/m² peak brightness 2560 Hz PWM dimming |
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 | Proximity Light Accelerometer Compass Gyroscope Magnetometer |
| Side-mounted fingerprint sensor | Side-mounted fingerprint sensor | 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 type | CMOS | CMOS | CMOS |
| Sensor format | - | - | 1/1.67" |
| Pixel size | - | - | 0.64 µm 0.000640 mm |
| Aperture | - | f/2 | f/1.7 |
| Focal length and 35 mm equivalent | - | - | 24 mm *(35 mm / full frame) |
| Flash type | LED | LED | Dual LED |
| Image resolution | 4130 x 3120 pixels 12.89 MP | 8192 x 6180 pixels 50.63 MP | 12000 x 9000 pixels 108 MP |
| Video resolution | 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 |
| Features | 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 Macro 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 |
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 |
| Focal length equivalent (35 mm) | - | - | 16 mm *(35 mm / full frame) |
| 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/2.4 | - |
| 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 type | CMOS | - | CMOS BSI |
| Sensor format | - | - | 1/4" |
| Pixel size | - | - | 0.7 µm 0.000700 mm |
| Aperture | - | f/2.05 | f/2.2 |
| Image resolution | 3520 x 2270 pixels 7.99 MP | 3648 x 2190 pixels 7.99 MP | 20 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 detection | Face unlock HDR | Face unlock Face detection |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece Stereo speakers |
| - | - | Dolby Atmos |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | No | 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 |
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 802.11аd | 802.11а 802.11b 802.11g Wi-Fi Disрlаy 802.11а 802.11ас 5GНz | 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 | 5.1 | 5.2 |
| Features | A2DP LE | 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 | USB Type-C | Micro USB |
| Version | 2.0 | 2.0 | 2.0 |
| Features | Charging Mass storage | 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 | No | No |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Tethering VoLTE | Computer sync OTA sync Tethering VoLTE | Computer sync OTA sync Infrared Tethering NFC 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 AMR eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AMR aptX aptX HD FLAC MIDI MP3 OGG WMA WAV APE LDAC | AAC AMR aptX 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 H.263 H.264 MP4 | 3GPP AVI DivX H.263 H.264 MP4 WebM WMV Xvid | 3GPP AVI H.263 H.264 MKV QuickTime MP4 WebM WMV 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 | 5200 mAh | 7200 mAh | 6000 mAh |
| Type | Li-Polymer | Li-Polymer | Li-Polymer |
| 4G stand-by time | 1188 h 30 min 1188.5 h 71310 min 49.5 days | - | - |
| Charger output power | 9 V / 2 A | 11 V / 4 A 5 V / 3 A | 11 V / 3 A |
| Features | Fast charging Non-removable | Fast charging Non-removable | Fast charging Non-removable |
| - | - | 18W reverse wired charging |
Additional features
Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.
| Additional features | Accessories for the magnetic rear shell subject to a separate purchase itel MagSpeaker Magnetic bracket Magnetic card bag Magnetic radiator | - | - |
| itel City 100 | Vivo Y31d | Xiaomi Redmi Note 15 4G |