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Phone	Sony Ericsson Z550a	BlackBerry Curve 8320	Motorola Krave ZN4	Ericsson R278d	Siemens SX66 / MDA III / PDA2K (HTC Blue Angel)
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	1.9" diag. 4 : 3	?	2.8" diag. 5 : 3	?	?
Display Resolution & Type	176 x 220 pixels (~148 ppi) LCD (TFT/TFD)	320 x 240 pixels LCD (TFT/TFD)	240 x 400 pixels (~167 ppi) LCD (TFT/TFD)	101 x 40 pixels	240 x 320 pixels LCD (TFT/TFD)
Display Refresh	?	?	?	?	?
Battery	?	1,100 mAh	950 mAh	?	1,490 mAh
Processor	?	?	?	?	400 MHz Intel XScale
RAM	?	?	?	?	?
Storage	? raw hardware	? raw hardware	? raw hardware	? raw hardware	? raw hardware
Main Camera	1 megapixel	2 megapixel	2 megapixel	-	Yes
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	-	QVGA (320 x 240)	-	QCIF (176 x 144)
Front Camera	-	-	-	-	-
Weight	3.26 oz (92g)	3.92 oz (111g)	4.52 oz (128g)	9.28 oz (263g)	7.41 oz (210g)
Dimensions	3.43" x 1.77" x 0.79" (87 x 45 x 20.1 mm)	4.21" x 2.36" x 0.61" (107 x 60 x 15.5 mm)	4.12" x 2.01" x 0.74" (105 x 51 x 18.8 mm)	5.1" x 2" x 1" (130 x 51 x 25.4 mm)	4.92" x 2.83" x 0.75" (125 x 72 x 19.1 mm)
Form Factor	Clamshell	Slab	Flip	Slab	Slide
Platform / OS	(proprietary)	BlackBerry OS	(proprietary)	(proprietary)	Windows Mobile Professional
Network Bands	GSM: 850, 900, 1800, 1900 *	GSM: 850, 900, 1800, 1900	CDMA: 850, 1900	TDMA: 850, 1900 AMPS: 850	GSM: 850, 900, 1800, 1900
Data Technology	GPRS	EDGE	EVDO r0	-	GPRS
Features
GPS / Location	-	n/a	Yes	-	n/a
Accessibility
Adjustable Text Size	-	n/a	-	-	n/a
Hearing Aid Compatible	-	Yes M3, T3 (mostly tele-coil compatible)	Yes M4, T4 (very tele-coil compatible)	-	-
Multiple Languages	Yes	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	-	-
Alerts
Extra Display	Yes	-	-	-	-
Ringer Profiles	Yes	Yes	-	Yes	-
Connectivity
Bluetooth	Yes	Yes	Yes	-	Yes
Infrared (IR)	-	-	-	-	Yes
USB	Yes	Yes	Yes Micro-USB	-	Yes
Wi-Fi	-	Yes 802.11 b,g	-	-	Yes
Contacts
Picture ID	Yes	n/a	Yes	-	n/a
Ringer ID	Yes	n/a	Yes	-	n/a
Voice Dialing	Yes	n/a	Yes	-	n/a
Customization
Custom Graphics	Yes	n/a	Yes	-	n/a
Custom Ringtones	Yes	n/a	Yes	Yes	n/a
Real-Music Ringers	Yes	n/a	Yes	-	n/a
Data & Network
Data Tethering	Yes	n/a	Yes	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
Touch Screen	-	-	Yes	-	Yes
Memory
Memory Card Slot	Yes	Yes	Yes	-	Yes
Messaging
Email Client	Yes	n/a	Yes	-	n/a
EMS / Picture Messaging	-	n/a	Yes	-	n/a
Instant Messaging	-	n/a	Yes	-	n/a
MMS	Yes	n/a	Yes	-	n/a
Text Messaging Templates	Yes	n/a	Yes	-	n/a
Music
FM Radio	Yes	-	-	-	-
Headphone Jack (3.5mm)	-	Yes	Yes	-	-
Music Player	Yes	n/a	Yes	-	n/a
Productivity
Alarm	Yes	n/a	Yes	Yes	n/a
Calculator	Yes	n/a	Yes	-	n/a
Calendar	Yes	n/a	Yes	-	n/a
To-Do List	Yes	n/a	-	-	n/a
Voice Memo	Yes	n/a	Yes	-	n/a
Software
BREW	-	n/a	Yes	-	n/a
Games	Yes	n/a	Yes	-	n/a
Java (J2ME)	Yes	n/a	-	-	n/a
Voice
Headset Jack (2.5 mm)	-	n/a	-	-	n/a
Push-To-Talk	Yes *	-	-	-	-
Speaker Phone	Yes	Yes	Yes	-	Yes
	* Some versions only
	Sony Ericsson Z550a	BlackBerry Curve 8320	Motorola Krave ZN4	Ericsson R278d	Siemens SX66 / MDA III / PDA2K (HTC Blue Angel)
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Sony Ericsson Z550a	BlackBerry Curve 8320	Motorola Krave ZN4	Ericsson R278d	Siemens SX66 / MDA III / PDA2K (HTC Blue Angel)