Celkon A21 vs Plum Optimax 10
Celkon A21
Plum Optimax 10
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Network
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2G networkGSM 900, 1800GSM 850, 900, 1800, 1900
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3G networkHSDPA 2100HSDPA 850, 1900, 2100
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HSDPA speedHSDPA21.1 Mbps
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HSUPA speed-5.76 Mbps
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2014-122016-3
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Status2014-122016-4
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Design
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SIMDual SIM (dual stand-by)Dual SIM (Mini-SIM, dual stand-by)
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Height124.8 mm240.2 mm
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Width66.1 mm170.2 mm
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Thickness10.8 mm9.2 mm
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Weight115.3 g509 g
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ColorsBlack, Blue, RedBlack, White
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Display
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Display typeCapacitive touchscreenIPS LCD capacitive touchscreen
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Physical size4.0 inches10.1 inches
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Resolution320 x 480 pixels800 x 1280 pixels
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Pixel density144 ppi149 ppi
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Display colors-16777216
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Multitouch-Yes, max 5 fingers
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Hardware
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CPUDual-core 1.2 GHzQuad-core 1.3 GHz ARM Cortex-A7
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ChipsetMediatek MT6582Mediatek MT8321
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GPU-Mali-400
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Memory ROM512 MB-
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Memory RAM256 MB1 GB
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Internal storage-8 GB
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Memory cardmicroSDmicroSD
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Memory card max32 GB32 GB
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OS
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OSAndroid OS, v4.2.2 (Jelly Bean)Android OS, v5.1 (Lollipop)
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Main camera
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Main camera3.15 MP5 MP
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Primary camera videovideo720p@30fps
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Camera features-Geo-tagging, HDR, face detection, panorama
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Selfie camera
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Selfie camera1.3 MP2 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, Polyphonic, MP3 ringtonesVibration; MP3, WAV ringtones
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Multimedia
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Radio FMFM radioFM radio
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Connectivity
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WLANWi-FiWi-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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USBYes2.0
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Bluetoothv4.0v4.0
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GPSNoYes, with A-GPS
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Features
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Messaging SMSSMS(threaded view)SMS(threaded view)
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IM-IM
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Messaging Push Email-Push Email
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JavaYes, via Java MIDP emulatorNo
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Sensors-Accelerometer, proximity
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Browser
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HTMLYesYes
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Battery
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Battery typeLi-IonLi-Po
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Battery capacity1500 mAh4500 mAh
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Battery removable-Non-removable
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Talk time 2G-24 h
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Talk time 3G8 h14 h
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Standby time 2G-900 h
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Standby time 3G120 h800 h
