Digma Optima Prime 4 3G vs Oppo A31
Digma Optima Prime 4 3G
Oppo A31
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Network
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2G networkGSM 900, 1800GSM 850, 900, 1800, 1900
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3G networkHSDPA 1900HSDPA 850, 900, 2100
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4G network-LTE frequency band 1(2100), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
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HSDPA speed-42 Mbps
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HSUPA speed-5.76 Mbps
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LTE speed-LTE-A
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2018-42020-02
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Status2018-42020-02
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Design
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BuildPlasticPlastic
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SIMDual SIM (Micro-SIM/Mini-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height107.8 mm163.9 mm
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Width188 mm75.5 mm
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Thickness10 mm8.3 mm
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Weight270 g180 g
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ColorsBlackBlack, White
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Display
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Display typeTNIPS capacitive touchscreen
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Physical size7 inches6.5 inches
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Resolution1024 x 600 pixels720 x 1600 pixels
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Pixel density170 ppi270 ppi
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Display colors1677721616777216
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Protection-Scratch resistant
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MultitouchYesYes
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Hardware
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CPU-Octa-core
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CPUQuad-core 1.2 GHz Cortex-A7Quad-core 2.3 GHz Cortex-A53
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CPU(second)quad-core 1.8 GHz Cortex-A53
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ChipsetSpreadtrum SC7731CMediatek MT6765V/CB Helio P35
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GPUMali-400 MP1PowerVR GE8320
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Memory RAM1 GB4 GB
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Internal storage8 GB128 GB
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Memory cardmicroSD, microSDHC, microSDXCmicroSD, microSDHC, microSDXC
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Memory card max64 GB256 GB
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Storage-eMMC 5.1
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OS
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OSAndroid 7.0 NougatColorOS 6.1 (Android 9.0 Pie)
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Selfie camera
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Selfie camera0.31 MP8 MP, f/2.0
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1/5.0" , 1.75 µm
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Selfie camera resolution640 x 480 pixels3264 x 2448 pixels
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Selfie camera video480p@30fps MP1080p@30fps
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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EarpieceYesYes
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Multimedia
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RadioFM RadioFM Radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
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WLAN WiFi Hotspot-Yes
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WLAN WiFi Direct-Yes
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Wi-Fi display-Yes
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WLAN WiFi Dual Band-Yes
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USBmicroUSB 2.0microUSB 2.0
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USB On-The-Go-Yes
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Bluetoothv4.0v5.0
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Bluetooth A2DPYesYes
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bluetooth LE-Yes
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GPSYes, with A-GPSYes, with A-GPS
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BDS-Yes
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Features
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SensorsAccelerometerAccelerometer, compass, fingerprint, light, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Po
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Battery capacity2200 mAh4230 mAh
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Battery removableNon-removableNon-removable
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Main camera
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Camera type-Triple
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Main camera12 MP, f/1.8
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2 MP, f/2.4 , 27 mm
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2 MP, f/2.4
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Primary camera resolution-4096 x 3072 pixels
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Primary camera video-1080p@30fps
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Primary camera flash-LED flash
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Camera features-Autofocus, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro mode, phase detection autofocus
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Cost
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Price-200 USD
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