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Karbonn A21

Karbonn A15

Network
Technology	GSM / HSPA	GSM / HSPA
2G bands	GSM 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network	HSDPA 2100	HSDPA 2100
Speed	HSPA 7.2/0.384 Mbps	HSPA 7.2/0.384 Mbps

Launch
Announced	2012	2012
Status	Discontinued	Discontinued

Body
Dimensions	-	-
Weight	-	-
SIM	Dual SIM (Mini-SIM)	Dual SIM (Mini-SIM)

Display
Type	TFT, 256K colors	TFT
Size	4.5 inches, 57.6 cm2	4.0 inches, 45.5 cm2
Resolution	480 x 800 pixels, 5:3 ratio (~207 ppi density)	480 x 800 pixels, 5:3 ratio (~233 ppi density)

Platform
OS	Android 4.0 (Ice Cream Sandwich)	Android 4.0.4 (Ice Cream Sandwich)
CPU	Dual-core 1.2 GHz	1.0 GHz

Memory
Card slot	microSDHC (dedicated slot)	microSDHC (dedicated slot)
Internal	4GB 512MB RAM	4GB (2.5GB user available), 512MB RAM

Main Camera
Modules	5 MP, AF	3.15 MP
Features	LED flash
Video	Yes	Yes

Selfie Camera
Modules	1.3 MP	No
Video

Sound
Loudspeaker	Yes	Yes
3.5mm jack	Yes	Yes

Comms
WLAN	Wi-Fi 802.11 b/g/n	Wi-Fi 802.11 b/g/n
Bluetooth	2.1, A2DP	2.0
Positioning	GPS	GPS
NFC	No	No
Infrared port	No	No
Radio	No	FM radio
USB	microUSB 2.0	microUSB 2.0

Features
Sensors	Accelerometer, proximity	Accelerometer

Battery
Type	Li-Ion 1800 mAh, removable	Li-Ion 1420 mAh, removable
Stand-by	Up to 200 h	Up to 150 h
Talk time	Up to 5 h

Misc
Colors	Pearl White	Black
SAR		0.59 W/kg (head)
SAR EU	0.44 W/kg (head)
Price	About 130 EUR	About 80 EUR