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Karbonn A15

Karbonn A21

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

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

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

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

Selfie Camera
Modules	No	1.3 MP
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	2.0	2.1, A2DP
Positioning	GPS	GPS
NFC	No	No
Infrared port	No	No
Radio	FM radio	No
USB	microUSB 2.0	microUSB 2.0

Features
Sensors	Accelerometer	Accelerometer, proximity

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

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