Digma Optima Prime 4 3G vs Samsung Galaxy A21s
Digma Optima Prime 4 3G
Samsung Galaxy A21s
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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, 1900, 2100
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4G network-LTE frequency band 1, 2, 3, 5, 7, 8, 20, 28, 38, 40, 41
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HSDPA speed-42.2 Mbps
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HSUPA speed-5.76 Mbps
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LTE speed-LTE, Cat4, 151 Mbps download, 51 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2018-42020-05
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Status2018-42020-06
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Design
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BuildPlasticPlastic
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SIMDual SIM (Micro-SIM/Mini-SIM, dual stand-by)Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
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Height107.8 mm163.7 mm
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Width188 mm75.3 mm
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Thickness10 mm8.9 mm
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Weight270 g192 g
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ColorsBlackBlack, Blue, Red, White
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Display
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Display typeTNPLS TFT 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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MultitouchYes-
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Hardware
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CPU-Octa-core
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CPUQuad-core 1.2 GHz Cortex-A7Quad-core 2.0 GHz Cortex-A55
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CPU(second)quad-core 2.0 GHz Cortex-A55
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ChipsetSpreadtrum SC7731CExynos 850
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GPUMali-400 MP1Mali-G52
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Memory RAM1 GB3, 4, 6 GB
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Internal storage8 GB32, 64 GB
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Memory cardmicroSD, microSDHC, microSDXCmicroSD, microSDHC, microSDXC
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Memory card max64 GB512 GB
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OS
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OSAndroid 7.0 NougatOne UI 2.0(Android 10)
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Selfie camera
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Selfie camera0.31 MP13 MP, f/2.2 , 1/3.1" , 1.12 µm
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Selfie camera resolution640 x 480 pixels4160 x 3120 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 Radio-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi Hotspot-Yes
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WLAN WiFi Direct-Yes
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WLAN WiFi Dual Band-Yes
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USBmicroUSB 2.0Type-C 1.0 reversible connector
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Bluetoothv4.0v5.0
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Bluetooth A2DPYesYes
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bluetooth LE-Yes
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NFC-Yes (market dependent)
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GPSYes, with A-GPSYes, with A-GPS
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GLONASS-Yes
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GALILEO-Yes
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Beidou-Yes
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Features
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SensorsAccelerometerAccelerometer, fingerprint, geomagnetic, gyroscope, 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 mAh5000 mAh
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Battery removableNon-removableNon-removable
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Fast battery charging-Yes
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Main camera
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Camera type-Quad
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Main camera48 MP, f/2.0 , 26 mm, 1/2.0" , 0.8 µm
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8 MP, f/2.2 , 1/4.0" , 1.12 µm
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2 MP, f/2.4
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2 MP, f/2.4
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Primary camera resolution-8000 x 6000 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, continuous shooting, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode
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Cost
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Price-200 USD
