Comparison between:
- Oukitel C8 4G
- Gretel S55
- Gretel A9
- Cubot R9
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Oukitel C8 4G | Gretel S55 | Gretel A9 | Cubot R9 | |
 |  |  |  Prices | |
| Model alias | C8 LTE | - | - | - |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 70.5 mm 7.05 cm 0.231 ft 2.776 in | 77.2 mm 7.72 cm 0.253 ft 3.039 in | 72.8 mm 7.28 cm 0.239 ft 2.866 in | 72 mm 7.2 cm 0.236 ft 2.835 in |
| Height | 147 mm 14.7 cm 0.482 ft 5.787 in | 153.3 mm 15.33 cm 0.503 ft 6.035 in | 146.6 mm 14.66 cm 0.481 ft 5.772 in | 144 mm 14.4 cm 0.472 ft 5.669 in |
| Thickness | 10.2 mm 1.02 cm 0.033 ft 0.402 in | 8.7 mm 0.87 cm 0.029 ft 0.343 in | 8.7 mm 0.87 cm 0.029 ft 0.343 in | 7.85 mm 0.785 cm 0.026 ft 0.309 in |
| Weight | 156 g 0.34 lbs 5.5 oz | 174 g 0.38 lbs 6.14 oz | 164 g 0.36 lbs 5.78 oz | - |
| Volume | 105.71 cm³ 6.42 in³ | 102.96 cm³ 6.25 in³ | 92.85 cm³ 5.64 in³ | 81.39 cm³ 4.94 in³ |
| Colors | Black Gold Rose-gold Blue Purple | Black Red Blue Gold | Black Rose-gold | Black Gold Blue |
| Body materials | Plastic | Plastic | - | 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 | Micro-SIM Nano-SIM | Micro-SIM | Micro-SIM / microSD Nano-SIM | Micro-SIM Nano-SIM |
| Number of SIM cards | 2 | 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 | 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 | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz |
| W-CDMA | W-CDMA 900 MHz W-CDMA 2100 MHz | W-CDMA 900 MHz W-CDMA 2100 MHz | W-CDMA 900 MHz W-CDMA 2100 MHz | W-CDMA 900 MHz W-CDMA 2100 MHz |
| LTE | LTE 800 MHz LTE 1800 MHz LTE 2100 MHz LTE 2600 MHz | - | LTE 800 MHz LTE 900 MHz LTE 1800 MHz LTE 2100 MHz LTE 2600 MHz LTE-TDD 2300 MHz (B40) | - |
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+ | UMTS EDGE GPRS HSPA+ LTE Cat 4 | UMTS EDGE GPRS HSPA+ |
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 7.0 Nougat | Android 7.0 Nougat | Freeme OS (Android 6.0.1 Marshmallow) 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 MT6737 | MediaTek MT6580A | MediaTek MT6737 | MediaTek MT6580 |
| Process technology | 28 nm | 28 nm | 28 nm | 28 nm |
| CPU | ARM Cortex-A53 | ARM Cortex-A7 | ARM Cortex-A53 | ARM Cortex-A7 |
| CPU bits | 64 bit | 32 bit | 64 bit | 32 bit |
| Instruction set | ARMv8-A | ARMv7 | ARMv8-A | ARMv7 |
| Level 1 cache memory (L1) | 32 KB + 32 KB | 32 KB + 32 KB | 32 KB + 32 KB | 32 KB + 32 KB |
| Level 2 cache memory (L2) | 512 KB 0.5 MB | 512 KB 0.5 MB | 512 KB 0.5 MB | 512 KB 0.5 MB |
| CPU cores | 4 | 4 | 4 | 4 |
| CPU frequency | 1300 MHz | 1300 MHz | 1250 MHz | 1300 MHz |
| GPU | ARM Mali-T720 MP1 | ARM Mali-400 MP2 | ARM Mali-T720 MP1 | ARM Mali-400 MP2 |
| GPU cores | 1 | 2 | 1 | 2 |
| GPU frequency | 600 MHz | - | 600 MHz | - |
| RAM capacity | 2 GB | 1 GB | 2 GB | 2 GB |
| RAM type | LPDDR3 | - | LPDDR3 | - |
| RAM channels | Single channel | Single channel | Single channel | Single channel |
| RAM frequency | 640 MHz | 533 MHz | 640 MHz | 533 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 16 GB | 16 GB | 16 GB | 16 GB |
| - | - | eMMC | - |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | microSD microSDHC microSDXC | microSD microSDHC | 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 | IPS |
| Diagonal size | 5.5 in 139.7 mm 13.97 cm | 5.5 in 139.7 mm 13.97 cm | 5 in 127 mm 12.7 cm | 5 in 127 mm 12.7 cm |
| Width | 2.46 in 62.48 mm 6.25 cm | 2.7 in 68.49 mm 6.85 cm | 2.45 in 62.26 mm 6.23 cm | 2.45 in 62.26 mm 6.23 cm |
| Height | 4.92 in 124.95 mm 12.5 cm | 4.79 in 121.76 mm 12.18 cm | 4.36 in 110.69 mm 11.07 cm | 4.36 in 110.69 mm 11.07 cm |
| Aspect ratio | 2:1 2:1 (18:9) | 1.778:1 16:9 | 1.778:1 16:9 | 1.778:1 16:9 |
| Resolution | 640 x 1280 pixels | 720 x 1280 pixels | 720 x 1280 pixels | 720 x 1280 pixels |
| Pixel density | 260 ppi 102 ppcm | 267 ppi 104 ppcm | 294 ppi 115 ppcm | 294 ppi 115 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 75.57 % | 70.69 % | 64.79 % | 66.69 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch | Capacitive Multi-touch |
| Dragontrail glass 2.5D curved glass screen LTPS (Low Temperature PolySilicon) | Dragontrail glass 2.5D curved glass screen | - | 2.5D curved glass screen GFF full lamination 1300:1 contrast ratio 450 cd/m² 90% NTSC |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Fingerprint | Proximity Light Accelerometer Fingerprint | Proximity Light Accelerometer Fingerprint | Proximity Light Accelerometer 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 | GalaxyCore GC8024 | GalaxyCore GC8024 | Samsung S5K3H7 | - |
| Sensor type | CMOS BSI | CMOS BSI | CMOS BSI | CMOS |
| Sensor size | 3.67 x 2.76 mm 0.18 in | 3.67 x 2.76 mm 0.18 in | 4.54 x 3.42 mm 0.22 in | - |
| Pixel size | 1.124 µm 0.001124 mm | 1.124 µm 0.001124 mm | 1.39 µm 0.001390 mm | - |
| Crop factor | 9.42 | 9.42 | 7.62 | - |
| Aperture | - | - | f/1.8 | f/2.4 |
| Focal length and 35 mm equivalent | - | - | 3.5 mm 26.67 mm *(35 mm / full frame) | - |
| Number of lenses | - | - | - | 4 |
| Flash type | LED | LED | LED | LED |
| Image resolution | 3264 x 2448 pixels 7.99 MP | 3264 x 2448 pixels 7.99 MP | 3264 x 2448 pixels 7.99 MP | 4160 x 3120 pixels 12.98 MP |
| Video resolution | 1280 x 720 pixels 0.92 MP | 1280 x 720 pixels 0.92 MP | 1280 x 720 pixels 0.92 MP | 1280 x 720 pixels 0.92 MP |
| Video FPS | 30 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 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 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 Scene mode |
| Interpolated resolution - 13 MP | Secondary rear camera - 0.3 MP | Interpolated resolution - 13 MP | Flash - 0.5A |
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 | GalaxyCore GC2385 | - | GalaxyCore GC2155 | - |
| Sensor type | CMOS | - | - | CMOS |
| Sensor size | - | - | 2.8 x 2.1 mm 0.14 in | - |
| Pixel size | - | - | 1.75 µm 0.001750 mm | - |
| Crop factor | - | - | 12.36 | - |
| Aperture | - | - | f/2.8 | f/2.8 |
| Focal length and 35 mm equivalent | - | - | 3.5 mm 43.27 mm *(35 mm / full frame) | - |
| Auxiliary light | LED | - | LED | LED |
| Image resolution | 1600 x 1200 pixels 1.92 MP | 2560 x 1920 pixels 4.92 MP | 1600 x 1200 pixels 1.92 MP | 2560 x 1920 pixels 4.92 MP |
| Video resolution | 640 x 480 pixels 0.31 MP | 640 x 480 pixels 0.31 MP | 640 x 480 pixels 0.31 MP | 640 x 480 pixels 0.31 MP |
| Video FPS | 30 fps | 30 fps | 30 fps | 30 fps |
| Interpolated resolution - 5 MP | - | Interpolated resolution - 5 MP | - |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker | Loudspeaker | Loudspeaker Earpiece |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | Yes | Yes | Yes |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GPS A-GPS | GPS A-GPS | GPS A-GPS | 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 Wi-Fi Hotspot | 802.11b 802.11g 802.11n Wi-Fi Hotspot | 802.11b 802.11g 802.11n Wi-Fi Hotspot | 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 | 4.0 |
| Features | A2DP | 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 | Micro USB |
| Version | 2.0 | 2.0 | 2.0 | 2.0 |
| Features | Charging Mass storage | Charging Mass storage | Charging Mass storage On-The-Go | 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 | Yes |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Tethering | Computer sync OTA sync Tethering | 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 | 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 eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AMR AMR-WB 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 MP4 Xvid | 3GPP AVI MKV MP4 Xvid | 3GPP AVI DivX Flash Video H.263 H.264 MKV QuickTime 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 | 3000 mAh | 2600 mAh | 2300 mAh | 2600 mAh |
| Type | Li-Ion | Li-Ion | Li-Ion | Li-Polymer |
| Charger output power | 5 V / 1 A | - | 5 V / 1 A | - |
| Features | Removable | Removable | Non-removable | Removable |
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) | - | - | - | 0.654 W/kg |
| Body SAR (EU) | - | - | - | 0.911 W/kg |
| Oukitel C8 4G | Gretel S55 | Gretel A9 | Cubot R9 |