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Phone	HP iPAQ 510 Voice Messenger	Nokia 6555	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	176 x 220 pixels (~141 ppi) LCD (TFT/TFD)	240 x 320 pixels (~200 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	1,100 mAh	1,020 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	3.6 oz (102g)	3.42 oz (97g)	4.44 oz (126g)	3.7 oz (105g)	4.73 oz (134g)
Dimensions	4.21" x 1.91" x 0.64" (107 x 49 x 16.3 mm)	3.92" x 1.74" x 0.77" (100 x 44 x 19.6 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	Slab	Clamshell	Clamshell	Slab	Slab
Platform / OS	Windows Mobile Standard	(proprietary)	(proprietary)	(proprietary)	BlackBerry OS
Network Bands	GSM: 850, 900, 1800, 1900	WCDMA: 2, 5 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	EDGE	WCDMA (UMTS)	1xRTT	WCDMA (UMTS)	EDGE
Features
GPS / Location	n/a	-	Yes	Yes	n/a
Accessibility
Adjustable Text Size	n/a	Yes	-	-	n/a
Hearing Aid Compatible	-	Yes M3, T3 (mostly tele-coil compatible)	-	Yes M3, T3 (mostly tele-coil compatible)	-
Multiple Languages	n/a	Yes	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 Mini-USB	Yes Micro-USB	Yes	Yes Micro-USB	Yes Mini-USB
Wi-Fi	Yes 802.11 b,g	-	-	-	Yes
Contacts
Picture ID	n/a	Yes	Yes	Yes	n/a
Ringer ID	n/a	Yes	Yes	Yes	n/a
Voice Dialing	n/a	Yes	Yes	-	n/a
Customization
Custom Graphics	n/a	Yes	Yes	Yes	n/a
Custom Ringtones	n/a	Yes	Yes	Yes	n/a
Real-Music Ringers	n/a	Yes	Yes	Yes	n/a
Data & Network
Data Tethering	n/a	Yes	Yes	-	n/a
WAP / Web Browser	n/a	Yes	Yes	Yes	n/a
Input
Predictive Text Entry	n/a	Yes	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	n/a	Yes	-	Yes	n/a
Instant Messaging	n/a	Yes	-	-	n/a
MMS	n/a	Yes	Yes	Yes	n/a
Text Messaging Templates	n/a	Yes	Yes	Yes	n/a
Music
FM Radio	-	-	Yes	-	-
Headphone Jack (3.5mm)	-	-	-	Yes	-
Music Player	n/a	Yes	-	Yes	n/a
Productivity
Alarm	n/a	Yes	Yes	Yes	n/a
Calculator	n/a	Yes	Yes	Yes	n/a
Calendar	n/a	Yes	Yes	Yes	n/a
To-Do List	n/a	Yes	Yes	-	n/a
Voice Memo	n/a	Yes	Yes	Yes	n/a
Software
BREW	n/a	-	Yes *	-	n/a
Games	n/a	Yes	Yes	Yes	n/a
Java (J2ME)	n/a	Yes	Yes *	Yes	n/a
Voice
Headset Jack (2.5 mm)	n/a	Yes	Yes	-	n/a
Push-To-Talk	-	Yes *	Yes *	-	Yes *
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	HP iPAQ 510 Voice Messenger	Nokia 6555	Nokia 6155i	ZTE Aspect	BlackBerry 8820
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


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