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Phone	Nokia 6555	HP iPAQ 510 Voice Messenger	Nokia 6155i	BlackBerry 8820	ZTE Aspect
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	2" diag. 4 : 3	2" diag. 4 : 3	?	?	2.4" diag. 4 : 3
Display Resolution & Type	240 x 320 pixels (~200 ppi) LCD (TFT/TFD)	176 x 220 pixels (~141 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	320 x 240 pixels LCD (TFT/TFD)	320 x 240 pixels (~167 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	?	?
Battery	1,020 mAh	1,100 mAh	1,070 mAh	1,400 mAh	1,000 mAh
Processor	?	200 MHz TI OMAP 850	?	?	230 MHz Qualcomm QSC6270
RAM	?	?	?	?	128 MB
Storage	? raw hardware	? raw hardware	? raw hardware	? raw hardware	256 MB
Main Camera	1 megapixel	1 megapixel	1 megapixel	-	2 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	QCIF (176 x 144)	QCIF (176 x 144)	sub-QCIF (128 x 96)	-	QVGA (320 x 240)
Front Camera	-	-	-	-	-
Weight	3.42 oz (97g)	3.6 oz (102g)	4.44 oz (126g)	4.73 oz (134g)	3.7 oz (105g)
Dimensions	3.92" x 1.74" x 0.77" (100 x 44 x 19.6 mm)	4.21" x 1.91" x 0.64" (107 x 49 x 16.3 mm)	3.41" x 1.79" x 1.02" (87 x 45 x 25.9 mm)	4.49" x 2.6" x 0.55" (114 x 66 x 14 mm)	4.55" x 2.4" x 0.45" (116 x 61 x 11.4 mm)
Form Factor	Clamshell	Slab	Clamshell	Slab	Slab
Platform / OS	(proprietary)	Windows Mobile Standard	(proprietary)	BlackBerry OS	(proprietary)
Network Bands	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 *	GSM: 850, 900, 1800, 1900	CDMA: 850, 1900 AMPS: 850	GSM: 850, 900, 1800, 1900	WCDMA: 2, 4 GSM: 850, 900, 1800, 1900
Data Technology	WCDMA (UMTS)	EDGE	1xRTT	EDGE	WCDMA (UMTS)
Features
GPS / Location	-	n/a	Yes	n/a	Yes
Accessibility
Adjustable Text Size	Yes	n/a	-	n/a	-
Hearing Aid Compatible	Yes M3, T3 (mostly tele-coil compatible)	-	-	-	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	n/a	Yes	n/a	Yes
TTY/TDD (Digital)	Yes	-	Yes	Yes	Yes
Alerts
Extra Display	Yes	-	Yes	-	-
Ringer Profiles	Yes	Yes	Yes	Yes	Yes
Connectivity
Bluetooth	Yes	Yes	-	Yes	Yes
Infrared (IR)	-	-	Yes	-	-
USB	Yes Micro-USB	Yes Mini-USB	Yes	Yes Mini-USB	Yes Micro-USB
Wi-Fi	-	Yes 802.11 b,g	-	Yes	-
Contacts
Picture ID	Yes	n/a	Yes	n/a	Yes
Ringer ID	Yes	n/a	Yes	n/a	Yes
Voice Dialing	Yes	n/a	Yes	n/a	-
Customization
Custom Graphics	Yes	n/a	Yes	n/a	Yes
Custom Ringtones	Yes	n/a	Yes	n/a	Yes
Real-Music Ringers	Yes	n/a	Yes	n/a	Yes
Data & Network
Data Tethering	Yes	n/a	Yes	n/a	-
WAP / Web Browser	Yes	n/a	Yes	n/a	Yes
Input
Predictive Text Entry	Yes	n/a	Yes	n/a	Yes
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	-	Yes	Yes
Memory
Memory Card Slot	Yes	Yes	-	Yes	Yes
Messaging
Email Client	Yes	n/a	-	n/a	Yes
Instant Messaging	Yes	n/a	-	n/a	-
MMS	Yes	n/a	Yes	n/a	Yes
Text Messaging Templates	Yes	n/a	Yes	n/a	Yes
Music
FM Radio	-	-	Yes	-	-
Headphone Jack (3.5mm)	-	-	-	-	Yes
Music Player	Yes	n/a	-	n/a	Yes
Productivity
Alarm	Yes	n/a	Yes	n/a	Yes
Calculator	Yes	n/a	Yes	n/a	Yes
Calendar	Yes	n/a	Yes	n/a	Yes
To-Do List	Yes	n/a	Yes	n/a	-
Voice Memo	Yes	n/a	Yes	n/a	Yes
Software
BREW	-	n/a	Yes *	n/a	-
Games	Yes	n/a	Yes	n/a	Yes
Java (J2ME)	Yes	n/a	Yes *	n/a	Yes
Voice
Headset Jack (2.5 mm)	Yes	n/a	Yes	n/a	-
Push-To-Talk	Yes *	-	Yes *	Yes *	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Nokia 6555	HP iPAQ 510 Voice Messenger	Nokia 6155i	BlackBerry 8820	ZTE Aspect
	X >	< X >	< X >	< X >	< X

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


Phone	Nokia 6555	HP iPAQ 510 Voice Messenger	Nokia 6155i	BlackBerry 8820	ZTE Aspect