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Phone	Samsung SGH-X820	ZTE Engage LT / Engage MT	Samsung SPH-i550	Samsung Droid Charge	BlackBerry 7750
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Not yet released	Released	Released
Display Size	?	4" diag. 5 : 3	?	4.3" diag. 5 : 3	?
Display Resolution & Type	220 x 176 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	320 x 320 pixels LCD (TFT/TFD)	480 x 800 pixels (~217 ppi) AMOLED	240 x 240 pixels LCD (Color)
Display Refresh	?	60 Hz	?	60 Hz	?
Battery	650 mAh	1,900 mAh	?	1,500 mAh	?
Processor	?	?	200 MHz Motorola MX-1	1 GHz Samsung Hummingbird	?
RAM	?	1 GB	?	?	?
Storage	? raw hardware	4 GB	? raw hardware	? raw hardware	? raw hardware
Main Camera	2 megapixel	3 megapixel	1 megapixel	8 megapixel	-
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	WVGA / 480p	?	720p HD	-
Front Camera	-	Yes	-	1 megapixel	-
Weight	2.33 oz (66g)	5.09 oz (144g)	?	5.06 oz (144g)	5.01 oz (142g)
Dimensions	4.45" x 1.97" x 0.27" (113 x 50 x 6.9 mm)	4.78" x 2.54" x 0.46" (121 x 64 x 11.7 mm)	3.46" x 2.34" x 1.1" (88 x 59 x 27.9 mm)	5.1" x 2.68" x 0.46" (130 x 68 x 11.7 mm)	4.76" x 3.03" x 0.71" (121 x 77 x 18 mm)
Form Factor	Slab	Slab	Clamshell	Slab	Slab
Platform / OS	(proprietary)	Android	Palm OS	Android	BlackBerry OS
Network Bands	GSM: 900, 1800, 1900	CDMA: 850, 1700, 1900	CDMA: 850, 1900 AMPS: 850	4G LTE: 13 CDMA: 850, 1900	CDMA: 850, 1900
Data Technology	EDGE	EVDO rA	1xRTT	LTE (Cat 3)	1xRTT
Features
GPS / Location	-	n/a	n/a	n/a	n/a
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a	n/a
Hearing Aid Compatible	-	-	-	Yes M4, T4 (very tele-coil compatible)	-
Multiple Languages	Yes	n/a	n/a	n/a	n/a
TTY/TDD (Digital)	-	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	-	Yes	-	-
Ringer Profiles	-	-	-	-	Yes
Connectivity
Bluetooth	Yes	Yes	-	Yes	-
Infrared (IR)	-	-	Yes	-	-
Mobile Hotspot	-	n/a	n/a	n/a	n/a
USB	Yes	Yes Micro-USB	-	Yes Micro-USB	Yes
Wi-Fi	-	Yes	-	Yes 4 (802.11 b,g,n)	-
Contacts
Picture ID	Yes	n/a	n/a	n/a	n/a
Ringer ID	Yes	n/a	n/a	n/a	n/a
Voice Dialing	-	n/a	n/a	n/a	n/a
Customization
Custom Graphics	Yes	n/a	n/a	n/a	n/a
Custom Ringtones	Yes	n/a	n/a	n/a	n/a
Real-Music Ringers	Yes	n/a	n/a	n/a	n/a
Data & Network
Data Tethering	-	n/a	n/a	n/a	n/a
External Antenna Jack	Yes	n/a	n/a	n/a	n/a
WAP / Web Browser	Yes	n/a	n/a	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	n/a	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	-	Yes Capacitive	Yes	Yes Capacitive	-
Memory
Memory Card Slot	-	Yes	Yes	Yes	-
Messaging
Email Client	Yes	n/a	n/a	n/a	n/a
EMS / Picture Messaging	Yes	n/a	n/a	n/a	n/a
Instant Messaging	-	n/a	n/a	n/a	n/a
MMS	Yes	n/a	n/a	n/a	n/a
Text Messaging Templates	Yes	n/a	n/a	n/a	n/a
Music
Headphone Jack (3.5mm)	-	Yes	-	Yes	-
Music Player	-	n/a	n/a	n/a	n/a
Photo & Video
DLNA	-	-	-	Yes	-
TV Output	Yes	-	-	Yes	-
Video Calling	-	n/a	n/a	n/a	n/a
Productivity
Alarm	Yes	n/a	n/a	n/a	n/a
Calculator	Yes	n/a	n/a	n/a	n/a
Calendar	Yes	n/a	n/a	n/a	n/a
To-Do List	Yes	n/a	n/a	n/a	n/a
Voice Memo	Yes	n/a	n/a	n/a	n/a
Software
Games	Yes	n/a	n/a	n/a	n/a
Java (J2ME)	Yes	n/a	n/a	n/a	n/a
Voice
Headset Jack (2.5 mm)	-	n/a	n/a	n/a	n/a
Speaker Phone	Yes	Yes	-	Yes	-
	Samsung SGH-X820	ZTE Engage LT / Engage MT	Samsung SPH-i550	Samsung Droid Charge	BlackBerry 7750
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X820	ZTE Engage LT / Engage MT	Samsung SPH-i550	Samsung Droid Charge	BlackBerry 7750