Comparison between:
- UMIDIGI A3 Pro
- Kenxinda S9
- Kenxinda S7
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| UMIDIGI A3 Pro | Kenxinda S9 | Kenxinda S7 | |
 Prices |  |  | |
| Model alias | A3Pro | - | - |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 70.2 mm 7.02 cm 0.23 ft 2.764 in | 76 mm 7.6 cm 0.249 ft 2.992 in | 72 mm 7.2 cm 0.236 ft 2.835 in |
| Height | 147.2 mm 14.72 cm 0.483 ft 5.795 in | 154 mm 15.4 cm 0.505 ft 6.063 in | 145 mm 14.5 cm 0.476 ft 5.709 in |
| Thickness | 8.5 mm 0.85 cm 0.028 ft 0.335 in | 9.2 mm 0.92 cm 0.03 ft 0.362 in | 9.2 mm 0.92 cm 0.03 ft 0.362 in |
| Weight | 185 g 0.41 lbs 6.53 oz | 205 g 0.45 lbs 7.23 oz | 188 g 0.41 lbs 6.63 oz |
| Volume | 87.83 cm³ 5.33 in³ | 107.68 cm³ 6.54 in³ | 96.05 cm³ 5.83 in³ |
| Colors | Gray Gold | Gold Rose-gold Gray Black | Black Gray Gold Pink |
| Body materials | Metal Plastic | Metal | 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 Nano-SIM / microSD | 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) | - | - |
Networks
A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.
| GSM | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz |
| W-CDMA | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1700 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz |
| LTE | LTE 700 MHz Class 17 LTE 800 MHz LTE 850 MHz LTE 900 MHz LTE 1700/2100 MHz LTE 1800 MHz LTE 1900 MHz LTE 2100 MHz LTE 2600 MHz LTE-TDD 2300 MHz (B40) LTE-TDD 2500 MHz (B41) LTE-TDD 2600 MHz (B38) LTE 700 MHz (B12) LTE 800 MHz (B19) | LTE 700 MHz Class 17 LTE 800 MHz LTE 850 MHz LTE 900 MHz LTE 1700/2100 MHz LTE 1800 MHz LTE 1900 MHz LTE 2100 MHz LTE 2600 MHz | LTE 700 MHz Class 17 LTE 800 MHz LTE 850 MHz LTE 1700/2100 MHz LTE 1800 MHz LTE 1900 MHz LTE 2100 MHz LTE 2600 MHz |
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 | UMTS EDGE GPRS HSPA+ LTE Cat 4 | UMTS EDGE GPRS HSPA+ LTE Cat 4 | UMTS EDGE GPRS HSPA+ LTE Cat 4 |
Operating system
Operating system is the system software, which manages and controls the functioning of the hardware components of the device.
| Operating system (OS) | Android 8.1 Oreo | Android 7.0 Nougat | Android 7.0 Nougat |
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 | MediaTek MT6739 | MediaTek MT6737 | MediaTek MT6737 |
| Process technology | 28 nm | 28 nm | 28 nm |
| CPU | 4x 1.5 GHz ARM Cortex-A53 | 4x 1.3 GHz ARM Cortex-A53 | 4x 1.3 GHz ARM Cortex-A53 |
| CPU bits | 64 bit | 64 bit | 64 bit |
| Instruction set | ARMv8-A | ARMv8-A | ARMv8-A |
| Level 1 cache memory (L1) | - | 32 KB + 32 KB | 32 KB + 32 KB |
| Level 2 cache memory (L2) | - | 512 KB 0.5 MB | 512 KB 0.5 MB |
| CPU cores | 4 | 4 | 4 |
| CPU frequency | 1500 MHz | 1300 MHz | 1300 MHz |
| GPU | IMG PowerVR GE8100 | ARM Mali-T720 MP2 | ARM Mali-T720 MP2 |
| GPU cores | - | 2 | 2 |
| GPU frequency | 570 MHz | 550 MHz | 550 MHz |
| RAM capacity | 3 GB | 3 GB | 2 GB |
| RAM type | LPDDR3 | LPDDR3 | LPDDR3 |
| RAM channels | Single channel | Single channel | Single channel |
| RAM frequency | 667 MHz | 640 MHz | 640 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 32 GB | 32 GB | 16 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 | 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 | 5.7 in 144.78 mm 14.48 cm | 5.5 in 139.7 mm 13.97 cm | 5 in 127 mm 12.7 cm |
| Width | 2.45 in 62.25 mm 6.22 cm | 2.7 in 68.49 mm 6.85 cm | 2.45 in 62.26 mm 6.23 cm |
| Height | 5.15 in 130.72 mm 13.07 cm | 4.79 in 121.76 mm 12.18 cm | 4.36 in 110.69 mm 11.07 cm |
| Aspect ratio | 2.1:1 | 1.778:1 16:9 | 1.778:1 16:9 |
| Resolution | 720 x 1512 pixels | 720 x 1280 pixels | 720 x 1280 pixels |
| Pixel density | 294 ppi 115 ppcm | 267 ppi 104 ppcm | 294 ppi 115 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 78.99 % | 71.48 % | 66.23 % |
| Other features | Capacitive Multi-touch | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant |
| 2.5D curved glass screen | Display manufacturer - AU Optronics Corning Gorilla Glass 3 | Corning Gorilla Glass 3 |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Compass Gyroscope Fingerprint | Proximity Light Accelerometer Compass Fingerprint | Proximity Light Accelerometer Compass Fingerprint |
Rear camera
The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.
| Sensor model | OmniVision OV12870 | - | - |
| Sensor type | PureCel | CMOS | CMOS |
| Pixel size | 1.25 µm 0.001250 mm | - | - |
| ISO | 100 - 1600 | - | - |
| Aperture | f/2 | - | - |
| Focal length and 35 mm equivalent | 3.5 mm | - | - |
| Number of lenses | 6 | - | - |
| Flash type | Dual LED | Dual LED | Dual LED |
| Image resolution | 3968 x 2976 pixels 11.81 MP | 4160 x 3120 pixels 12.98 MP | 4160 x 3120 pixels 12.98 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1280 x 720 pixels 0.92 MP | 1280 x 720 pixels 0.92 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 Phase detection autofocus (PDAF) | 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 Geotagging Panorama HDR Touch focus Face detection White balance settings ISO settings Exposure compensation Self-timer Scene mode |
| Available also with Sony IMX386 Exmor RS (CMOS) Secondary rear camera - 5 MP | Secondary rear camera - 8 MP | Secondary rear camera - 8 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 OV8856 | - | - |
| Sensor type | PureCel | - | - |
| Sensor size | 3.68 x 2.77 mm 0.18 in | - | - |
| Pixel size | 1.127 µm 0.001127 mm | - | - |
| Crop factor | 9.4 | - | - |
| Aperture | f/2 | - | - |
| Focal length and 35 mm equivalent | 3.5 mm 32.9 mm *(35 mm / full frame) | - | - |
| Image resolution | 3264 x 2448 pixels 7.99 MP | 3264 x 2448 pixels 7.99 MP | 3264 x 2448 pixels 7.99 MP |
| Video resolution | 1280 x 720 pixels 0.92 MP | - | - |
| Video FPS | 30 fps | - | - |
| Features | Face unlock | - | - |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece |
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 | GPS A-GPS GLONASS BeiDou | GPS A-GPS GLONASS BeiDou | GPS A-GPS |
Wi-Fi
Wi-Fi is a technology that provides wireless data connections between various devices within a short range.
| Wi-Fi | 802.11a 802.11b 802.11g 802.11n 802.11n 5GHz Dual band Wi-Fi Hotspot Wi-Fi Direct Wi-Fi Display | 802.11b 802.11g 802.11n Wi-Fi Hotspot Wi-Fi Direct | 802.11b 802.11g 802.11n Wi-Fi Hotspot Wi-Fi Direct |
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
| Version | 4.0 | 4.0 | 4.0 |
| Features | A2DP | A2DP | A2DP |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | Micro USB | Micro USB | Micro USB |
| Version | 2.0 | 2.0 | 2.0 |
| Features | Charging Mass storage On-The-Go | Charging Mass storage | Charging Mass storage |
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 Tethering VoLTE | Computer sync OTA sync Tethering | 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 | 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 | AAC AMR eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AMR 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 MKV MP4 WebM Xvid | 3GPP AVI H.263 H.264 MP4 WebM WMV Xvid | 3GPP AVI H.263 H.264 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 | 3300 mAh | 5000 mAh | 4500 mAh |
| Type | Li-Polymer | Li-Ion | Li-Ion |
| Charger output power | 5 V / 1 A | - | - |
| Features | Non-removable | Non-removable | Non-removable |
| UMIDIGI A3 Pro | Kenxinda S9 | Kenxinda S7 |