Panasonic T31 vs Xiaomi Redmi Note 2 vs Xiaomi Mi 4i

General Info

Manufacturer
Panasonic	Xiaomi	Xiaomi
Announced
October 2013	August 2015	April 2015
Status
Available - November 2013	Available - August 2015	Available - April 2015
Price
-	Rs. 9,700 ($141.99) [Similarly Priced]	Rs. 8,999 ($132.34) [Similarly Priced]
Colors
Bluish Black, Pure White	Black, White, Yellow, Mint Green, Blue	Black, White, Blue, Yellow, Pink
Form Factor
Candybar	Candybar	Candybar
Dimension
122 x 64.4 x 11.95 mm (4.8 x 2.54 x 0.47 in)	152 x 76 x 8.3 mm (5.98 x 2.99 x 0.33 in)	138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in)
Weight
120 g (4.23 oz)	160 g (5.64 oz)	130 g (4.59 oz)
2G Network
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network
HSDPA 850 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100, TD-SCDMA	HSDPA 850 / 900 / 1900 / 2100
4G Network
-	LTE band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500)	LTE
Messaging
SMS, MMS, EMail, IM	SMS, MMS, EMail, IM	SMS, MMS, EMail, IM

OS
Android OS, v4.2.2 (Jelly Bean) with FOTA upgrade	Android OS, v5.0 (Lollipop) based MIUI 7	Android OS, v5.0 (Lollipop)
Processor
Dual-core 1.3 GHz, MTK 6572	Octa-core 2.0 GHz Cortex-A53, Mediatek MT6795	Quad-core 1.7 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615
GPU
Mali-400	PowerVR G6200	Adreno 405
RAM
512 MB	2 GB	2 GB
Internal Memory
4 GB (1.9 GB user memory)	16 GB	16/32 GB
External Memory
microSD, up to 32 GB	Yes	No

Type
TFT capacitive touchscreen	IPS LCD capacitive touchscreen	IPS LCD capacitive touchscreen
Colors
16M colors	16M colors	16M colors
Size
4.0 inches	5.5 inches	5.0 inches
Resolution
480 x 800 pixels (233 ppi)	1080 x 1920 pixels (401 ppi)	1080 x 1920 pixels (441 ppi)
Screen-to-Body Ratio
58.08%	72.02%	71.57%
Multi-Touch

Rear Camera
3.2 MP, 2048x1536 pixels	13 MP, 4128 x 3096 pixels	13 MP, 4128 x 3096 pixels
Flash
No	LED flash	LED flash
Features
Fixed Focus, Geo-tagging	Phase Detection Auto focus (PDAF), Geo-tagging, Touch Focus, Face/smile Detection, HDR	Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR
Video
Yes, VGA@30fps	1080p@30fps	1080p@30fps
Front Camera
Yes, VGA	5 MP	5 MP

GPRS
Yes	Yes	Yes
Edge
Yes	Yes	Yes
3G
HSDPA, 21 Mbps; HSUPA, 5.76 Mbps	TD-SCDMA	HSPA, LTE
Bluetooth
Yes, v4.0 with A2DP	v4.0, A2DP, LE	v4.0, A2DP
Wi-Fi
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot	Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot	Wi-Fi 802.11 a/b/g/n, dual-band, hotspot
USB
Yes, microUSB v2.0	microUSB v2.0, USB Host	microUSB v2.0
GPS
Yes, with A-GPS support	Yes, with A-GPS, GLONASS	Yes, with A-GPS, GLONASS
Browser
HTML5	HTML5	HTML5