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Phone	Samsung SPH-i550	ZTE Z998 / Unico LTE	ZTE Prelude / Avail 2
Current U.S. Carriers	(none)	(none)	(none)
Global Availability	Not yet released	Released	Released
Display Size	?	4.5" diag. 16 : 9	3.5" diag. 5 : 3
Display Resolution & Type	320 x 320 pixels LCD (TFT/TFD)	540 x 960 pixels (~245 ppi) LCD (TFT/TFD)	320 x 480 pixels (~165 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	60 Hz
Battery	?	2,070 mAh	1,500 mAh
Processor	200 MHz Motorola MX-1	1.2 GHz Qualcomm Snapdragon 400 MSM8930	1 GHz Qualcomm Snapdragon MSM7225A
RAM	?	1 GB	512 MB
Storage	? raw hardware	4 GB	4 GB
Main Camera	1 megapixel	5 megapixel	2 megapixel
Wide Camera	-	-	-
Tele Camera	-	-	-
Video Capture	?	720p HD	VGA (640 x 480)
Front Camera	-	1 megapixel	-
Weight	?	4.8 oz (136g)	4.4 oz (125g)
Dimensions	3.46" x 2.34" x 1.1" (88 x 59 x 27.9 mm)	5.2" x 2.6" x 0.4" (132 x 66 x 10.2 mm)	4.6" x 2.44" x 0.45" (117 x 62 x 11.4 mm)
Platform / OS	Palm OS	Android	Android
Network Bands	CDMA: 850, 1900 AMPS: 850	4G LTE: 2, 4, 5, 17 WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 *	WCDMA: 2, 5 GSM: 850, 1900
Data Technology	1xRTT	LTE (Cat 3)	HSPA 7.2
Features
Accessibility
Hearing Aid Compatible	-	Yes M3, T4 (very tele-coil compatible)	Yes M3, T4 (very tele-coil compatible)
TTY/TDD (Digital)	Yes	Yes	Yes
Alerts
Extra Display	Yes	-	-
Connectivity
Bluetooth	-	Yes	Yes
Infrared (IR)	Yes	-	-
USB	-	Yes Micro-USB	Yes
Wi-Fi	-	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 b,g,n)
Input
Side Keys	Yes	Yes	Yes
Touch Screen	Yes	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	Yes
Music
Headphone Jack (3.5mm)	-	Yes	Yes
Voice
Speaker Phone	-	Yes	Yes
	Samsung SPH-i550	ZTE Z998 / Unico LTE	ZTE Prelude / Avail 2
	X >	< X >	< X

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


Phone	Samsung SPH-i550	ZTE Z998 / Unico LTE	ZTE Prelude / Avail 2