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Phone	Nokia 6555	HP iPAQ 510 Voice Messenger	Nokia 6155i	ZTE Aspect	BlackBerry 8820
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 (~167 ppi) LCD (TFT/TFD)	320 x 240 pixels LCD (TFT/TFD)
Display Refresh	?	?	?	?	?
Battery	1,020 mAh	1,100 mAh	1,070 mAh	1,000 mAh	1,400 mAh
Processor	?	200 MHz TI OMAP 850	?	230 MHz Qualcomm QSC6270	?
RAM	?	?	?	128 MB	?
Storage	? raw hardware	? raw hardware	? raw hardware	256 MB	? raw hardware
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)	3.7 oz (105g)	4.73 oz (134g)
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)	4.55" x 2.4" x 0.45" (116 x 61 x 11.4 mm)	4.49" x 2.6" x 0.55" (114 x 66 x 14 mm)
Form Factor	Clamshell	Slab	Clamshell	Slab	Slab
Platform / OS	(proprietary)	Windows Mobile Standard	(proprietary)	(proprietary)	BlackBerry OS
Network Bands	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 *	GSM: 850, 900, 1800, 1900	CDMA: 850, 1900 AMPS: 850	WCDMA: 2, 4 GSM: 850, 900, 1800, 1900	GSM: 850, 900, 1800, 1900
Data Technology	WCDMA (UMTS)	EDGE	1xRTT	WCDMA (UMTS)	EDGE
Features
GPS / Location	-	n/a	Yes	Yes	n/a
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	Yes	n/a
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 Micro-USB	Yes Mini-USB
Wi-Fi	-	Yes 802.11 b,g	-	-	Yes
Contacts
Picture ID	Yes	n/a	Yes	Yes	n/a
Ringer ID	Yes	n/a	Yes	Yes	n/a
Voice Dialing	Yes	n/a	Yes	-	n/a
Customization
Custom Graphics	Yes	n/a	Yes	Yes	n/a
Custom Ringtones	Yes	n/a	Yes	Yes	n/a
Real-Music Ringers	Yes	n/a	Yes	Yes	n/a
Data & Network
Data Tethering	Yes	n/a	Yes	-	n/a
WAP / Web Browser	Yes	n/a	Yes	Yes	n/a
Input
Predictive Text Entry	Yes	n/a	Yes	Yes	n/a
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	-	Yes	n/a
Instant Messaging	Yes	n/a	-	-	n/a
MMS	Yes	n/a	Yes	Yes	n/a
Text Messaging Templates	Yes	n/a	Yes	Yes	n/a
Music
FM Radio	-	-	Yes	-	-
Headphone Jack (3.5mm)	-	-	-	Yes	-
Music Player	Yes	n/a	-	Yes	n/a
Productivity
Alarm	Yes	n/a	Yes	Yes	n/a
Calculator	Yes	n/a	Yes	Yes	n/a
Calendar	Yes	n/a	Yes	Yes	n/a
To-Do List	Yes	n/a	Yes	-	n/a
Voice Memo	Yes	n/a	Yes	Yes	n/a
Software
BREW	-	n/a	Yes *	-	n/a
Games	Yes	n/a	Yes	Yes	n/a
Java (J2ME)	Yes	n/a	Yes *	Yes	n/a
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	ZTE Aspect	BlackBerry 8820
	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	ZTE Aspect	BlackBerry 8820