Karbonn K21 Plus Radio Jockey vs Micromax X920

Key Specs

Battery
Battery	1000 mAh	1450 mAh
Display
Display	2.2 inches (5.59 cm)	2.8 inches (7.11 cm)
Front Camera
Front Camera	-	0.3 MP
RAM
RAM	-	32 MB
Rear Camera
Rear Camera	0.3 MP	0.3 MP

Battery

Capacity
Capacity	1000 mAh	1450 mAh
Standby time
Standby Time	Up to 250(2G)	Up to 7 Day(2G)
TalkTime
TalkTime	Up to 3.5(2G)	Up to 4 Hours(2G)
Type
Type	Li-ion	Li-ion

Camera

Camera Features
Camera Features	Digital Zoom Smile detection	-
Camera Setup
Camera Setup	Single	-
Flash
Flash	Yes	-
Resolution
Resolution	0.3 MP Primary Camera	-
Shooting Modes
Shooting Modes	Continuous Shooting	-

Design

Colours
Colours	Silver+Black	Grey
Height
Height	-	126 mm
Thickness
Thickness	-	12 mm
Weight
Weight	-	102 grams
Width
Width	-	55 mm

Display

Display Type
Display Type	LCD	TFT
Pixel Density
Pixel Density	93 ppi	143 ppi
Resolution
Resolution	-	240x320 px
Screen Size
Screen Size	2.2 inches (5.59 cm)	2.8 inches (7.11 cm)
Screen to Body Ratio (calculated)
Screen to Body Ratio (calculated)	-	35.03 %
Touch Screen
Touch Screen	-	No

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Front Camera

Resolution
Resolution	-	0.3 MP Front Camera

General

Brand
Brand	Karbonn	-
Launch Date
Launch Date	September 20, 2012	-

Main Camera

Camera Features
Camera Features	-	Digital Zoom
Camera Setup
Camera Setup	-	Single
Image Resolution
Image Resolution	-	640 x 480 Pixels
Resolution
Resolution	-	0.3 MP Primary Camera

Multimedia

Audio Jack
Audio Jack	-	3.5 mm
FM Radio
FM Radio	Yes	Yes
Fm Radio
FM Radio	Yes	-
Loudspeaker
Loudspeaker	-	Yes
Music
Music	Yes, Music Formats: Yes, Music Formats : MP3, MIDI, WAV, WMA, AMR with Equalizer, Big Speaker	Yes, Music Formats: AMR, MIDI, MP3, WAV
Ring Tone
Ring Tone	-	Music ringtones, Polyphonic ringtones, Vibration
Special Features
Special Features	-	Torch Light
Video Player
Video Player	-	Yes, Video Formats: 3GP, AVI, MP4
Video player
Video player	-	Yes, Video Formats: 3GP, AVI, MP4

Network & Connectivity

Bluetooth
Bluetooth	Yes	Yes
Network Support
Network Support	5G Not Supported in India, 2G	5G Not Supported in India, 2G
SIM 1
SIM 1	GPRS: Available	2G Bands: GSM 1800 / 900 MHz GPRS: Available
SIM 2
SIM 2	-	2G Bands: GSM 1800 / 900 MHz
SIM Slot(s)
SIM Slot(s)	Dual SIM, GSM+GSM	Dual SIM, GSM+GSM
USB Connectivity
USB Connectivity	-	microUSB 2.0
Wi-Fi
Wi-Fi	No	-

Sensors

Browser
Browser	Yes	Yes, WAP
Games
Games	-	Yes
Java
Java	No	-
Other Facilities
Other Facilities	Calculator, CLID with Photo, Alarm clock, Stop Watch, World Times, Speed Dialing, Organizer	Calculator, Stopwatch, Calendar, Alarm
Phone Book
Phone Book	Yes, 300 Entries + SIM1 + SIM2	Yes, Limited
SMS
SMS	Yes, SMS Storage 100 + SIM1 + SIM2	-
Sms
Sms	Yes, SMS Storage 100 + SIM1 + SIM2	-

Storage

Expandable Memory
Expandable Memory	Yes, Up to 4 GB	Yes, Up to 16 GB
Internal Memory
Internal Memory	-	32 MB