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Celkon
Celkon A21
Compare Celkon A21 and Xiaomi Redmi 4a

Celkon A21 vs Xiaomi Redmi 4a

Celkon A21
Celkon A21
Xiaomi Redmi 4a
Xiaomi Redmi 4a
Celkon A21
Xiaomi Redmi 4a
  • Network
  • 2G network
    GSM 900, 1800
    GSM 850, 900, 1800, 1900; CDMA 800, 1900
  • 3G network
    HSDPA 2100
    HSDPA 850, 900, 1900, 2100; CDMA2000 1xEV-DO & TD-SCDMA
  • 4G network
    -
    LTE frequency band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500)
  • HSDPA speed
    HSDPA
    -
  • HSPA speed
    -
    HSPA
  • LTE speed
    -
    LTE
  • GPRS
    Yes
    Yes
  • EDGE
    Yes
    Yes
  • Availability
  • Oficially announced
    2014-12
    2016-11
  • Status
    2014-12
    2016-11
  • Design
  • SIM
    Dual SIM (dual stand-by)
    Dual SIM
  • Height
    124.8 mm
    139.5 mm
  • Width
    66.1 mm
    70.4 mm
  • Thickness
    10.8 mm
    8.5 mm
  • Weight
    115.3 g
    131.5 g
  • Colors
    Black, Blue, Red
    Gold, Rose Gold
  • Display
  • Display type
    Capacitive touchscreen
    IPS LCD capacitive touchscreen
  • Physical size
    4.0 inches
    5.0 inches
  • Resolution
    320 x 480 pixels
    720 x 1280 pixels
  • Pixel density
    144 ppi
    294 ppi
  • Display colors
    -
    16777216
  • Multitouch
    -
    Yes
  • Hardware
  • CPU
    Dual-core 1.2 GHz
    Quad-core 1.4 GHz ARM Cortex-A53
  • Chipset
    Mediatek MT6582
    Qualcomm MSM8917 Snapdragon 425
  • GPU
    -
    Adreno 308
  • Memory ROM
    512 MB
    -
  • Memory RAM
    256 MB
    2 GB
  • Internal storage
    -
    16 GB
  • Memory card
    microSD
    microSD(uses second SIM slot)
  • Memory card max
    32 GB
    256 GB
  • OS
  • OS
    Android OS, v4.2.2 (Jelly Bean)
    Android OS, v6.0.1 (Marshmallow)
  • Main camera
  • Main camera
    3.15 MP
    13 MP, f/2.2
  • Primary camera video
    video
    1080p@30fps
  • Primary camera Autofocus
    -
    autofocus
  • Primary camera flash
    -
    LED flash
  • Camera features
    -
    Geo-tagging, HDR, face/smile detection, panorama, touch focus
  • Selfie camera
  • Selfie camera
    1.3 MP
    5 MP, f/2.2
  • Sound
  • 3.5mm jack
    Yes
    Yes
  • Loudspeaker
    Yes
    Yes
  • Notifications
    Vibration, Polyphonic, MP3 ringtones
    Vibration; MP3, WAV ringtones
  • Multimedia
  • Radio FM
    FM radio
    FM radio
  • Connectivity
  • WLAN
    Wi-Fi
    Wi-Fi 802.11b, 802.11g, 802.11n
  • WLAN WiFi Hotspot
    -
    Yes
  • WLAN WiFi Direct
    -
    Yes
  • USB
    Yes
    microUSB 2.0
  • Bluetooth
    v4.0
    v4.1
  • Bluetooth A2DP
    -
    Yes
  • bluetooth LE
    -
    Yes
  • Infrared
    -
    Yes
  • GPS
    No
    Yes, with A-GPS
  • GLONASS
    -
    Yes
  • BDS
    -
    Yes
  • Features
  • Messaging SMS
    SMS(threaded view)
    SMS(threaded view)
  • Messaging MMS
    MMS
    MMS
  • Messaging Email
    Email
    Email
  • Messaging IM
    -
    IM
  • Messaging Push Mail
    -
    Push Mail
  • Java
    Yes, via Java MIDP emulator
    No
  • Sensors
    -
    Accelerometer, compass, gyro, proximity
  • Browser
  • HTML
    Yes
    HTML5
  • Battery
  • Battery type
    Li-Ion
    Li-Ion
  • Battery capacity
    1500 mAh
    3120 mAh
  • Battery removable
    -
    Non-removable
  • Talk time 3G
    8 h
    -
  • Standby time 3G
    120 h
    -

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