Karbonn Smart A51 vs XOLO Win Q900s

General Info

Manufacturer
Karbonn	XOLO
Announced
September 2013	June 2014
Status
Available - September 2013	Available - July 2014
Colors
White Silver	Black, White
Form Factor
Candybar	Candybar
Dimension
-	135.8 x 67.2 x 7.2 mm (5.35 x 2.65 x 0.28 in)
Weight
-	100 g (3.53 oz)
2G Network
GSM 900 / 1800 - SIM 1 & SIM 2	GSM 900 / 1800 - SIM 1 & SIM 2
3G Network
No	HSDPA 2100
Messaging
SMS, MMS, EMail, IM	SMS, MMS, Push Mail, EMail, IM
Build Features
-	cratch Resistant Dragon Trail Glass Protection

OS
Android OS, v4.0 (Ice Cream Sandwich)	Microsoft Windows Phone 8.1
Processor
1 GHz [Similar]	Quad-core 1.2 GHz Cortex-A7, Qualcomm MSM8212 Snapdragon 200 [Similar]
GPU
-	Adreno 302 [Similar]
RAM
256 MB [Browse Similar]	1 GB [Browse Similar]
Internal Memory
512 MB (100 MB user available)	8 GB ROM (5 GB for mass storage and apps)
External Memory
microSD, up to 32 GB	microSD, up to 32 GB

Type
TFT capacitive touchscreen	IPS LCD Capacitive Touchscreen, OGS
Colors
16M colors	16M colors
Size
3.5 inches [Similar]	4.7 inches [Similar]
Resolution
320 x 480 pixels (165 ppi)	720 x 1280 pixels (312 ppi) [Similar]
Screen-to-Body Ratio
-	66.93%
Multi-Touch

Rear Camera
3.15 MP, 2048x1536 pixels [Similar]	8 MP, 3264x2448 pixels [Similar]
Flash
LED flash	LED Flash
Features
-	Auto focus, Geo-tagging, Panorama
Video
Yes	Yes, 720p@30fps
Front Camera
Yes, VGA [Similar]	Yes, 2 MP [Similar]

GPRS
Yes	Yes
Edge
Yes	Yes
3G
No	HSDPA, 21 Mbps; HSUPA, 5.76 Mbps
Bluetooth
Yes	Yes, v4.0 with A2DP
Wi-Fi
Wi-Fi 802.11 b/g, Wi-Fi hotspot	Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot
USB
Yes	Yes, microUSB v2.0
GPS
No	Yes, with A-GPS support and GLONASS
Browser
HTML	HTML5

Internal
512 MB (100 MB user available), 256 MB RAM	8 GB ROM (5 GB for mass storage and apps), 1 GB RAM
Expandable Storage
microSD, up to 32 GB	microSD, up to 32 GB