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Phone	ZTE Z331	Palm Treo 600 (CDMA)	ZTE Agent	Nokia E90	Kyocera DuraForce XD
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	2.4" diag. 4 : 3	?	2.4" diag. 4 : 3	?	5.7" diag. 16 : 9
Display Resolution & Type	176 x 220 pixels (~117 ppi) LCD (TFT/TFD)	160 x 160 pixels LCD (Color)	240 x 320 pixels (~167 ppi) LCD (TFT/TFD)	800 x 352 pixels LCD (TFT/TFD)	720 x 1280 pixels (~258 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	?	60 Hz
Battery	950 mAh	?	900 mAh	1,500 mAh	3,700 mAh
Processor	?	?	?	332 MHz ARM 11	1.6 GHz Qualcomm Snapdragon 400 (MSM8928)
RAM	?	?	?	?	2 GB
Storage	? raw hardware	? raw hardware	? raw hardware	? raw hardware	16 GB
Main Camera	3 megapixel	Yes	1 megapixel	3 megapixel	8 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	QCIF (176 x 144)	-	?	VGA (640 x 480)	1080p HD
Front Camera	-	-	-	-	2 megapixel
Weight	4 oz (113g)	6.2 oz (176g)	3.53 oz (100g)	7.41 oz (210g)	10.83 oz (307g)
Dimensions	3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm)	4.41" x 2.36" x 0.87" (112 x 60 x 22.1 mm)	4.3" x 1.9" x 0.6" (109 x 48 x 15.2 mm)	5.2" x 2.24" x 0.79" (132 x 57 x 20.1 mm)	6.57" x 3.4" x 0.55" (167 x 86 x 14 mm)
Form Factor	Clamshell	Slab	Slab	Clamshell	Slab
Platform / OS	(proprietary)	Palm OS	(proprietary)	S60 (Symbian)	Android
Network Bands	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900	CDMA: 850, 1700, 1900	WCDMA: 1 GSM: 850, 900, 1800, 1900	4G LTE: 1, 2, 3, 4, 5, 7, 17, 20, 29 WCDMA: 1, 2, 5, 8 GSM: 850, 900, 1800, 1900
Data Technology	HSDPA 3.6	1xRTT	1xRTT	HSDPA 3.6	LTE (Cat 3)
Features
Flashlight	-	-	-	-	Yes
GPS / Location	Yes	n/a	Yes	n/a	n/a
Ruggedized	-	-	-	-	Yes
Water-Resistant	-	-	-	-	Yes IPX8 (SCUBA)
Accessibility
Adjustable Text Size	-	n/a	-	n/a	n/a
Hearing Aid Compatible	Yes M3, T4 (very tele-coil compatible)	-	Yes M4, T4 (very tele-coil compatible)	-	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	-	Yes
Alerts
Extra Display	Yes	-	-	Yes	-
Ringer Profiles	Yes	-	-	Yes	-
Connectivity
Bluetooth	Yes	-	Yes	Yes	Yes
Infrared (IR)	-	Yes	-	Yes	-
Mobile Hotspot	-	n/a	-	n/a	n/a
NFC	-	-	-	-	Yes
USB	Yes Micro-USB	Yes	Yes Micro-USB	Yes Mini-USB	Yes Micro-USB
Wi-Fi	-	-	-	Yes 802.11 b,g	Yes 5 (802.11 a,ac,b,g,n)
Contacts
Picture ID	Yes	n/a	-	n/a	n/a
Ringer ID	Yes	n/a	Yes	n/a	n/a
Voice Dialing	-	n/a	-	n/a	n/a
Customization
Custom Graphics	Yes	n/a	Yes	n/a	n/a
Custom Ringtones	Yes	n/a	Yes	n/a	n/a
Real-Music Ringers	Yes	n/a	Yes	n/a	n/a
Data & Network
Data Tethering	Yes	n/a	-	n/a	n/a
WAP / Web Browser	Yes	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	Yes	-	Yes	-
Touch Screen	-	Yes	-	-	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	Yes	Yes	Yes
Messaging
Email Client	Yes	n/a	Yes	n/a	n/a
Instant Messaging	Yes	n/a	Yes	n/a	n/a
MMS	Yes	n/a	Yes	n/a	n/a
Text Messaging Templates	Yes	n/a	Yes	n/a	n/a
Music
FM Radio	-	-	-	Yes	-
Headphone Jack (3.5mm)	-	-	Yes	-	Yes
Music Player	Yes	n/a	Yes	n/a	n/a
Photo & Video
Miracast	-	-	-	-	Yes
Video Calling	-	n/a	-	n/a	n/a
Power
Fast Charging	-	-	-	-	Yes
Productivity
Alarm	Yes	n/a	Yes	n/a	n/a
Calculator	Yes	n/a	Yes	n/a	n/a
Calendar	Yes	n/a	Yes	n/a	n/a
To-Do List	-	n/a	-	n/a	n/a
Voice Memo	Yes	n/a	Yes	n/a	n/a
Software
BREW	-	n/a	Yes	n/a	n/a
Games	Yes	n/a	Yes	n/a	n/a
Java (J2ME)	Yes	n/a	-	n/a	n/a
Voice
HD Voice	-	-	-	-	Yes
Headset Jack (2.5 mm)	-	n/a	-	n/a	n/a
Push-To-Talk	-	-	-	Yes *	Yes
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	ZTE Z331	Palm Treo 600 (CDMA)	ZTE Agent	Nokia E90	Kyocera DuraForce XD
	X >	< X >	< X >	< X >	< X

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


Phone	ZTE Z331	Palm Treo 600 (CDMA)	ZTE Agent	Nokia E90	Kyocera DuraForce XD