Karbonn K21 Plus Radio Jockey vs Karbonn K31

Key Specs

Battery
Battery	1000 mAh	1800 mAh
Display
Display	2.2 inches (5.59 cm)	2.4 inches (6.1 cm)
Rear Camera
Rear Camera	0.3 MP	0.3 MP

Battery

Capacity
Capacity	1000 mAh	1800 mAh
Standby time
Standby Time	Up to 250(2G)	-
TalkTime
TalkTime	Up to 3.5(2G)	-
Type
Type	Li-ion	Li-ion
User Replaceable
User Replaceable	-	Yes

Camera

Camera Features
Camera Features	Digital Zoom Smile detection	Digital Zoom
Camera Setup
Camera Setup	Single	Single
Flash
Flash	Yes	-
Image Resolution
Image Resolution	-	640 x 480 Pixels
Resolution
Resolution	0.3 MP Primary Camera	0.3 MP Primary Camera
Shooting Modes
Shooting Modes	Continuous Shooting	-

Design

Colours
Colours	Silver+Black	Black

Display

Display Type
Display Type	LCD	TFT
Pixel Density
Pixel Density	93 ppi	167 ppi
Screen Resolution
Screen Resolution	-	240 x 320 pixels
Screen Size
Screen Size	2.2 inches (5.59 cm)	2.4 inches (6.1 cm)

Not sure which
mobile to buy?

General

Brand
Brand	Karbonn	Karbonn
Launch Date
Launch Date	September 20, 2012	August 29, 2017 (Official)
Model
Model	-	K31
Network
Network	-	5G: Not Supported in India, 4G: Not Available, 3G: Not Available, 2G: Available

Multimedia

FM Radio
FM Radio	Yes	Yes, Recording option, Wireless FM
Fm Radio
FM Radio	Yes	Yes, Recording option, Wireless FM
Loudspeaker
Loudspeaker	-	Yes
Music
Music	Yes, Music Formats: Yes, Music Formats : MP3, MIDI, WAV, WMA, AMR with Equalizer, Big Speaker	Yes, Music Formats: MP3
Ring Tone
Ring Tone	-	Music ringtones, Polyphonic ringtones, Vibration
Special Features
Special Features	-	Auto Call Recording, Mobile Tracker
Video Player
Video Player	-	Yes, Video Formats: 3GP, MP4
Video player
Video player	-	Yes, Video Formats: 3GP, 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
Wi-Fi
Wi-Fi	No	-

Sensors

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

Smart TV Features

Camera
Camera	-	0.3 MP

Special Features

Browser
Browser	-	Yes, WAP
Games
Games	-	Yes
Other Facilities
Other Facilities	-	Calculator, Stopwatch, Calendar, Alarm
Phone Book
Phone Book	-	Yes, Limited

Storage

Expandable Memory
Expandable Memory	Yes, Up to 4 GB	Yes, Up to 16 GB