Comparison between:
- Microsoft Lumia 640 Dual SIM
- Mediacom PhonePad Duo S531U
- Mediacom PhonePad Duo G501
- Mediacom PhonePad Duo S510
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Microsoft Lumia 640 Dual SIM | Mediacom PhonePad Duo S531U | Mediacom PhonePad Duo G501 | Mediacom PhonePad Duo S510 | |
 |  |  |  | |
| Model alias | RM-1077 | - | - | - |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 72.2 mm 7.22 cm 0.237 ft 2.843 in | 73.8 mm 7.38 cm 0.242 ft 2.906 in | 72.6 mm 7.26 cm 0.238 ft 2.858 in | 70.1 mm 7.01 cm 0.23 ft 2.76 in |
| Height | 141.3 mm 14.13 cm 0.464 ft 5.563 in | 147.95 mm 14.795 cm 0.485 ft 5.825 in | 142.9 mm 14.29 cm 0.469 ft 5.626 in | 143 mm 14.3 cm 0.469 ft 5.63 in |
| Thickness | 8.8 mm 0.88 cm 0.029 ft 0.346 in | 8.15 mm 0.815 cm 0.027 ft 0.321 in | 9 mm 0.9 cm 0.03 ft 0.354 in | 6.9 mm 0.69 cm 0.023 ft 0.272 in |
| Weight | 145 g 0.32 lbs 5.11 oz | 147 g 0.32 lbs 5.19 oz | 152 g 0.34 lbs 5.36 oz | 120 g 0.26 lbs 4.23 oz |
| Volume | 89.78 cm³ 5.45 in³ | 88.99 cm³ 5.4 in³ | 93.37 cm³ 5.67 in³ | 69.17 cm³ 4.2 in³ |
| Colors | White Black Orange Cyan | Gray Gold | Gray Red Blue Green Yellow | Gold Gray |
| 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 | Micro-SIM Mini-SIM | Mini-SIM Micro-SIM | Micro-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) | 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 |
| UMTS | UMTS 850 MHz UMTS 900 MHz UMTS 1900 MHz UMTS 2100 MHz | UMTS 900 MHz UMTS 2100 MHz | UMTS 900 MHz UMTS 2100 MHz | UMTS 900 MHz UMTS 2100 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+ | UMTS EDGE GPRS HSPA+ | UMTS EDGE GPRS HSPA+ | 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) | Microsoft Windows Phone 8.1 Microsoft Windows 10 Mobile | Android 4.4.2 KitKat Android 5.0 Lollipop | Android 4.4.2 KitKat | Android 4.4 KitKat Android 5.0 Lollipop |
| User interface (UI) | Lumia Denim | - | - | - |
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 | Qualcomm Snapdragon 400 (MSM8926) | MediaTek MT6592M | MediaTek MT6582M | MediaTek MT6592M |
| Process technology | 28 nm | 28 nm | 28 nm | 28 nm |
| CPU | 4x 1.2 GHz ARM Cortex-A7 | 8x 1.4 GHz ARM Cortex-A7 | 4x 1.3 GHz ARM Cortex-A7 | 8x 1.4 GHz ARM Cortex-A7 |
| CPU bits | 32 bit | 32 bit | 32 bit | 32 bit |
| Instruction set | ARMv7-A | ARMv7-A | ARMv7-A | ARMv7-A |
| Level 1 cache memory (L1) | 16 KB + 16 KB | 32 KB + 32 KB | 32 KB + 32 KB | 32 KB + 32 KB |
| Level 2 cache memory (L2) | 1024 KB 1 MB | 1024 KB 1 MB | 512 KB 0.5 MB | 1024 KB 1 MB |
| CPU cores | 4 | 8 | 4 | 8 |
| CPU frequency | 1200 MHz | 1400 MHz | 1300 MHz | 1400 MHz |
| GPU | Qualcomm Adreno 305 | ARM Mali-450 MP4 | ARM Mali-400 MP2 | ARM Mali-450 MP4 |
| GPU cores | 1 | 4 | 2 | 4 |
| GPU frequency | 450 MHz | 600 MHz | 400 MHz | 600 MHz |
| RAM capacity | 1 GB | 1 GB | 512 MB | 1 GB |
| RAM type | LPDDR2/LPDDR3 | LPDDR2 | LPDDR2/LPDDR3 | LPDDR2 |
| RAM channels | Single channel | Single channel | Single channel | Single channel |
| RAM frequency | 533 MHz | 533 MHz | 533 MHz | 533 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 8 GB | 16 GB | 4 GB | 8 GB |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | microSD microSDHC microSDXC | microSD microSDHC | microSD microSDHC | microSD microSDHC |
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 in 127 mm 12.7 cm | 5.3 in 134.62 mm 13.46 cm | 5 in 127 mm 12.7 cm | 5 in 127 mm 12.7 cm |
| Width | 2.45 in 62.26 mm 6.23 cm | 2.6 in 66 mm 6.6 cm | 2.45 in 62.23 mm 6.22 cm | 2.45 in 62.26 mm 6.23 cm |
| Height | 4.36 in 110.69 mm 11.07 cm | 4.62 in 117.33 mm 11.73 cm | 4.36 in 110.71 mm 11.07 cm | 4.36 in 110.69 mm 11.07 cm |
| Aspect ratio | 1.778:1 16:9 | 1.778:1 16:9 | 1.779:1 | 1.778:1 16:9 |
| Resolution | 720 x 1280 pixels | 720 x 1280 pixels | 480 x 854 pixels | 720 x 1280 pixels |
| Pixel density | 294 ppi 115 ppcm | 277 ppi 108 ppcm | 196 ppi 77 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 | 67.77 % | 71.15 % | 66.62 % | 68.97 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch | Capacitive Multi-touch | Capacitive Multi-touch |
| Corning Gorilla Glass 3 ClearBlack display | - | - | - |
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 | Proximity Light Accelerometer | Proximity Light Accelerometer |
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 type | CMOS BSI | CMOS | CMOS | CMOS |
| Sensor size | 3.6 x 2.7 mm 0.18 in | - | - | - |
| Pixel size | 1.103 µm 0.001103 mm | - | - | - |
| Crop factor | 9.61 | - | - | - |
| Aperture | f/2.2 | - | - | - |
| Focal length and 35 mm equivalent | 2.91 mm 28.01 mm *(35 mm / full frame) | - | - | - |
| Flash type | LED | LED | LED | LED |
| Image resolution | 3264 x 2448 pixels 7.99 MP | 4160 x 3120 pixels 12.98 MP | 2592 x 1944 pixels 5.04 MP | 3264 x 2448 pixels 7.99 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 1280 x 720 pixels 0.92 MP | 1920 x 1080 pixels 2.07 MP |
| Video FPS | 30 fps | 30 fps | 30 fps | 30 fps |
| Features | Autofocus Continuous shooting Digital zoom Digital image stabilization Geotagging Panorama HDR Touch focus Face detection White balance settings ISO settings Exposure compensation 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 | 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 | 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 |
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.
| Aperture | f/2.4 | - | - | - |
| Image resolution | 1280 x 720 pixels 0.92 MP | 2560 x 1920 pixels 4.92 MP | 1600 x 1200 pixels 1.92 MP | 2560 x 1920 pixels 4.92 MP |
| Video resolution | 1280 x 720 pixels 0.92 MP | - | - | - |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece | 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 GLONASS Wi-Fi BeiDou | 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 | 802.11b 802.11g 802.11n Wi-Fi Hotspot | 802.11b 802.11g 802.11n Wi-Fi Hotspot | 802.11b 802.11g 802.11n | 802.11b 802.11g 802.11n Wi-Fi Hotspot |
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 AVRCP GATT HFP HID MAP OPP PAN PBAP | A2DP | A2DP LE | 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 | 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 DLNA | Computer sync OTA sync Infrared 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+ MIDI MP3 WMA WAV | AAC AAC+ AMR eAAC+ MIDI MP3 WMA WAV | AAC AMR eAAC+ MIDI MP3 WMA WAV | AAC AMR eAAC+ MIDI MP3 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 VC-1 | 3GPP AVI H.263 H.264 MP4 WMV Xvid | 3GPP AVI MP4 Xvid | 3GPP H.263 H.264 MP4 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 | 2500 mAh | 2500 mAh | 2200 mAh | 2000 mAh |
| Type | Li-Ion | Li-Ion | Li-Ion | Li-Ion |
| 2G talk time | 27 h 30 min 27.5 h 1650 min 1.1 days | - | - | - |
| 2G stand-by time | 840 h 50400 min 35 days | 150 h 9000 min 6.3 days | - | 120 h 7200 min 5 days |
| 3G talk time | 20 h 30 min 20.5 h 1230 min 0.9 days | - | - | - |
| 3G stand-by time | 840 h 50400 min 35 days | 120 h 7200 min 5 days | - | 100 h 6000 min 4.2 days |
| Features | Removable | 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 (USA) | 0.81 W/kg | - | - | - |
| Body SAR (USA) | 0.16 W/kg | - | - | - |
| Microsoft Lumia 640 Dual SIM | Mediacom PhonePad Duo S531U | Mediacom PhonePad Duo G501 | Mediacom PhonePad Duo S510 |