Quick Facts
91score
52
55
69
Reasons to Buy
  • Much sharper screen
  • 233 ppi vs 207 ppi vs 233 ppi
    High pixel density shows sharper text and extremely detailed photos/videos.
  • Has flash
  • Yes vs Yes vs No
    With flash, bright photos/videos are captured even in low-light conditions.

  • Larger screen
  • 4.0 inch vs 4.5 inch vs 4.0 inch
    Internet browsing or watching movies is more pleasing on large screens.
  • Much faster processor
  • 1000 MHz Single Core vs 1200 MHz Dual core vs 1200 MHz Dual core
    Fast processor smoothly executes multiple tasks/apps simultaneously.
  • Higher battery capacity
  • 1500 mAH vs 1800 mAH vs 1600 mAH
    Greater the capacity, lesser the need to charge your battery again.
  • Has FM Radio
  • No vs Yes vs No
    FM Radio allows you to listen to music & news from radio stations, even while travelling.
  • Much higher secondary camera resolution
  • 0.3 MP vs 1.3 MP vs 0.3 MP
    Front camera of high resolution results in sharp video-chats & self-photos.
  • Has flash
  • Yes vs Yes vs No
    With flash, bright photos/videos are captured even in low-light conditions.
.. » read more

  • Much faster processor
  • 1000 MHz Single Core vs 1200 MHz Dual core vs 1200 MHz Dual core
    Fast processor smoothly executes multiple tasks/apps simultaneously.
  • Much more RAM
  • 512.0 MB vs 512.0 MB vs 1.0 GB
    More RAM results in faster loading of multiple apps.
  • Higher battery capacity
  • 1500 mAH vs 1800 mAH vs 1600 mAH
    Greater the capacity, lesser the need to charge your battery again.
  • Much sharper screen
  • 233 ppi vs 207 ppi vs 233 ppi
    High pixel density shows sharper text and extremely detailed photos/videos.
  • Much more internal memory
  • 4.0 GB vs 4.0 GB vs 8.0 GB
    More internal storage allows having more apps, songs, videos, etc.
  • Much more expandable memory
  • 32 GB vs 32 GB vs 64 GB
    More expandable storage allows having more songs, photos, videos, etc.

Editor's Comments:
  • Distinct design and stylish looks
  • Crafted from metal and glass at the front and patterned polycarbonate available in vibrant hues at the back, the ASUS Zenfone 4 is your personal fashion statement.
  • Zippy performance
  • Powered by a dual-core Intel Atom processor clocked at 1.2GHz, the ASUS Zenfone 4 offers speedy performance and smooth multitasking abilities, without affecting the battery life.
  • Clutter-free, user-friendly interface
  • The custom ZenUI boasts a neat look and tons of handy features and apps.
  • Produces professional quality photos
  • Equipped with 5-megapixel primary camera and coupled with ASUS' proprietary PixelMaster technology, the device shoots impressive images.
.. » read more

Design
Operating system Android 4 (Ice Cream Sandwich) Android 4 (Ice Cream Sandwich) Android 4.3 (Jelly Bean)
Dimensions

        Height:124.4 mm

        Width:61.4 mm

        Thickness:11.5 mm

      Weight 115 grams
      Ruggedness
      Available Colors              
      Hardware
      System chip Intel Atom Z2520
      Processor 1000 MHz, Dual core, 1200 MHz, Qualcomm Snapdragon, Dual core, 1200 MHz,
      2D/3D GPU
      • PowerVR SGX544MP2
      RAM 512 MB 512 MB 1 GB
      Built-in storage 4 GB 4 GB 8 GB
      Memory card support Upto 32 GB microSD Upto 32 GB microSD Upto 64 GB microSD
      Display
      Physical size 4 Inch 4.5 Inch 4.0 Inch
      Display resolution 480x800 (233 ppi) 480x800 (207 ppi) 480x800 (233 ppi)
      Display Technology LCD TFT LCD
      Color Density 16M 256 16M
      Touch screen Capacitive, Multi-touch Capacitive, Multi-touch Capacitive, Multi-touch
      Camera
      Primary Camera 5 MP, 2592 x 1944 5 MP, 2592 x 1944 5 MP, 2592 x 1944
      Flash LED Flash LED Flash
      Zoom Digital Zoom Digital Zoom Digital Zoom
      Dedicated Camera Button
      Features
      • Auto Focus
      • Face detection
      • Auto Focus
      • Geo tagging
      Video Capture Yes Yes Yes
      Video Resolution 1920 x 1080p @ 30fps, 1280 x 720p @ 30fps
      Secondary camera 0.3 MP, 640 x 480 1.3 MP, 1280 x 1024 0.3 MP, 640 x 480
      Network
      SIM Type GSM+GSM GSM+GSM Micro, GSM+GSM
      Network technology GSM,UMTS/HSDPA/WCDMA GSM,UMTS/HSDPA/WCDMA GSM,UMTS/HSDPA/WCDMA
      Data HSDPA 7.2 Mbit/s(Download), HSUPA HSDPA 7.2 Mbit/s(Download), HSUPA HSDPA 42.2 Mbit/s(Download), HSUPA 5.76 Mbit/s(Upload)
      3G Yes Yes Yes
      4G
      GPRS
      • Yes
      • Yes
      • Yes
      EDGE
      • Yes
      • Yes
      • Yes
      GPS A-GPS,GPS GPS A-GPS,Glonass,GPS
      Connectivity
      Bluetooth Version 4, A2DP Version 2.1, A2DP Version 4.0, A2DP, EDR
      Wi-Fi 802.11

        Wi-Fi 802.11:Yes

        Standard:a,b,g,n

        Mobile Hotspot:Yes

        Wi-Fi 802.11:Yes

        Standard:b,g,n

        Wi-Fi 802.11:Yes

        Standard:b,g,n

        Mobile Hotspot:Yes

        Wi-Fi Direct:Yes

      USB microUSB 2.0 USB 2.0, microUSB 2.0 USB 2.0, microUSB 2.0
      Headphones connector 3.5mm 3.5mm 3.5mm
      External Device connector Computer sync, OTA sync, Tethering
      Battery
      Talk time 5 Hours(2G) 5 Hours(2G)
      Stand-by time 200 Hours(2G) 200 Hours(2G)
      Battery Capacity 1500 mAh, Li-ion 1800 mAh, Li-ion 1600 mAh, Li-Polymer
      Multimedia
      Music player
      • MP3
      • AAC, AAC+, AMR, MIDI, MP3, WAV
      • Album, Artist, Playlists
      • Album art cover, Background playback
      • 3GP, AAC, AAC+, MP3
      Video player
      • MPEG4
      • 3GP, H.263, H.264, MPEG4
      • H.263, H.264, MPEG4
      Radio

        Radio:FM

      Pre-loaded Apps
      Sensors
      Sensors Accelerometer, Light sensor, Magnetometer, Proximity sensor Accelerometer Accelerometer, Proximity sensor
      Phone Features
      Phonebook
      • Yes
      • Practically Unlimited
      • Yes
      • Practically Unlimited
      • Yes
      • Practically Unlimited
      • Caller groups,Multiple numbers per contact,Picture ID,Ring ID,Search by both first and last name
      Organizer Android Market, Calculator, World clock, Calendar, Alarm, Document viewer Android Market, World clock, Calendar, Alarm, Document viewer Android Market, Calculator, Stopwatch, World clock, Calendar, Alarm, Document viewer
      Keypad
      Sales Pack Handset, Battery, Charger, Earphone, USB Cable, User Manual, Warranty Card Handset, Battery, Charger, Earphone, USB Cable, User Manual, Warranty Card Handset, Battery, Charger, Earphone, USB Cable, User Manual, Warranty Card
      Availability
      Officially announced 01-Oct-2012 01-Oct-2012 07-Jan-2014
      Market status Available Available Available
      Price list

      ebay.in

      Rs.4,970
      Rs.7,625
      Rs.6,749

      flipkart.com

      NA
      Rs.7,790
      Rs.5,999

      saholic.com

      NA
      Rs.7,069
      NA

      maniacstore.com

      NA
      Rs.6,790
      NA
      expert reviews
      Expert's Rating
      & Reviews
      60 100

      Expert's Overall Score

      Based on expert reviews

      Karbonn A21 Review, Price, Specifications

      Karbonn has been making news recently with its dual-core Android-based smartphones and the A21 is the latest entrant in its Android smartphone line-up....

      customer reviews
      Customer's Rating
      & Reviews

      Overall User Rating (3.7/5 based on 3 ratings)

      ★★★★★
      ★★★★★

      Sanjay
      Delhi

      ★★★★★
      ★★★★★

      ★★★★★
      ★★★★★

      ★★★★★
      ★★★★★

      The Best Mobile For Normal People

      i use this mobile features are best,design very nice, handle very easy, but battery back not comport all that this mobile useful to normal people....

      Read More Reviews

      Overall User Rating (3.4/5 based on 5 ratings)

      ★★★★★
      ★★★★★

      Sanjay
      Delhi

      ★★★★★
      ★★★★★

      ★★★★★
      ★★★★★

      ★★★★★
      ★★★★★

      Karbonn A 21

      worth for the money.recommendable....

      Read More Reviews

      Overall User Rating (5/5 based on 1 ratings)

      ★★★★★
      ★★★★★

      Sanjay
      Delhi

      ★★★★★
      ★★★★★

      ★★★★★
      ★★★★★

      ★★★★★
      ★★★★★

      Asus Zenfone 4

      this phone is awesome, worth phone for price....

      Read More Reviews