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Phone	Microsoft Lumia 550	Samsung SGH-E400	Cal-Comp EZ	ZTE Blade Vantage	Samsung Convoy 4
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Not yet released	Released	Released	Released
Display Size	4.7" diag. 16 : 9	?	?	5" diag. 16 : 9	2.4" diag. 4 : 3
Display Resolution & Type	720 x 1280 pixels (~312 ppi) LCD (TFT/TFD)	128 x 144 pixels LCD (TFT/TFD)	128 x 128 pixels LCD (STN)	480 x 854 pixels (~196 ppi) LCD (TFT/TFD)	240 x 320 pixels (~167 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	60 Hz	?
Battery	2,100 mAh	700 mAh	800 mAh	2,500 mAh	1,300 mAh
Processor	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)	?	?	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)	480 MHz Qualcomm QSC6185
RAM	1 GB	?	?	2 GB	256 MB
Storage	8 GB	? raw hardware	? raw hardware	16 GB	512 MB
Main Camera	5 megapixel	-	-	8 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	-	-	720p HD	QVGA (320 x 240)
Front Camera	2 megapixel	-	-	2 megapixel	-
Weight	5.01 oz (142g)	3.1 oz (88g)	2.47 oz (70g)	5.29 oz (150g)	5.82 oz (165g)
Dimensions	5.36" x 2.67" x 0.39" (136 x 68 x 9.9 mm)	3.46" x 1.65" x 0.89" (88 x 42 x 22.6 mm)	4.04" x 1.71" x 0.63" (103 x 43 x 16 mm)	5.73" x 2.85" x 0.36" (146 x 72 x 9.2 mm)	4.26" x 2.18" x 0.93" (108 x 55 x 23.6 mm)
Form Factor	Slab	Clamshell	Slab	Slab	Clamshell
Platform / OS	Windows	(proprietary)	(proprietary)	Android	(proprietary)
Network Bands	4G LTE: 2, 4, 5, 7, 12, 17 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	GSM: 900, 1800, 1900	CDMA: 850, 1900	4G LTE: 2, 4, 5, 13	CDMA: 850, 1900 GSM: 850, 900, 1800, 1900
Data Technology	LTE (Cat 4)	GPRS	1xRTT	LTE (Cat 4)	EVDO rA
Features
Flashlight	Yes	-	-	Yes	Yes
GPS / Location	n/a	-	Yes	n/a	Yes
Ruggedized	-	-	-	-	Yes
Water-Resistant	-	-	-	-	Yes IPX7 (snorkeling)
Accessibility
Adjustable Text Size	n/a	-	-	n/a	Yes
Hearing Aid Compatible	Yes M3, T4 (very tele-coil compatible)	-	-	Yes M4, T4 (very tele-coil compatible)	Yes M3, T4 (very tele-coil compatible)
Multiple Languages	n/a	Yes	Yes	n/a	Yes
TTY/TDD (Digital)	Yes	-	-	Yes	Yes
Alerts
Extra Display	-	Yes	-	-	Yes
Connectivity
Bluetooth	Yes	-	-	Yes	Yes
Infrared (IR)	-	Yes	-	-	-
Mobile Hotspot	n/a	-	-	n/a	-
USB	Yes Micro-USB	-	Yes Mini-USB	Yes Micro-USB	Yes Micro-USB
Wi-Fi	Yes 4 (802.11 b,g,n)	-	-	Yes 4 (802.11 b,g,n)	-
Contacts
Picture ID	n/a	-	-	n/a	Yes
Ringer ID	n/a	-	-	n/a	Yes
Voice Dialing	n/a	-	-	n/a	Yes
Customization
Custom Graphics	n/a	Yes	-	n/a	Yes
Custom Ringtones	n/a	Yes	-	n/a	Yes
Real-Music Ringers	n/a	-	-	n/a	Yes
Data & Network
Data Tethering	n/a	Yes	-	n/a	-
WAP / Web Browser	n/a	Yes	-	n/a	Yes
Input
Predictive Text Entry	n/a	Yes	-	n/a	Yes
Side Keys	Yes	Yes	-	Yes	Yes
Touch Screen	Yes Capacitive	-	-	Yes Capacitive	-
Memory
Memory Card Slot	Yes	-	-	Yes	Yes
Messaging
Email Client	n/a	-	-	n/a	-
EMS / Picture Messaging	n/a	Yes	-	n/a	-
MMS	n/a	-	-	n/a	Yes
Text Messaging Templates	n/a	Yes	Yes	n/a	-
Music
FM Radio	Yes	-	-	-	-
Headphone Jack (3.5mm)	Yes	-	-	Yes	Yes
Music Player	n/a	-	-	n/a	Yes
Productivity
Alarm	n/a	Yes	Yes	n/a	Yes
Calculator	n/a	Yes	Yes	n/a	Yes
Calendar	n/a	Yes	Yes	n/a	Yes
To-Do List	n/a	Yes	Yes	n/a	-
Voice Memo	n/a	-	Yes *	n/a	Yes
Software
BREW	n/a	-	-	n/a	Yes
Games	n/a	Yes	-	n/a	Yes
Java (J2ME)	n/a	Yes	-	n/a	-
Voice
HD Voice	Yes	-	-	Yes	-
Headset Jack (2.5 mm)	n/a	Yes	Yes	n/a	-
Push-To-Talk	-	-	-	-	Yes
Speaker Phone	Yes	-	-	Yes	Yes
	* Some versions only
	Microsoft Lumia 550	Samsung SGH-E400	Cal-Comp EZ	ZTE Blade Vantage	Samsung Convoy 4
	X >	< X >	< X >	< X >	< X

NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Microsoft Lumia 550	Samsung SGH-E400	Cal-Comp EZ	ZTE Blade Vantage	Samsung Convoy 4