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Phone	Samsung MM-A900 / SPH-A900 / Ace	Cricket Debut S2 / AT&T Calypso 4	Huawei Ascend Q	Sony Ericsson Z520 / Z525	Siemens SX66 / MDA III / PDA2K (HTC Blue Angel)
Current U.S. Carriers	(none)	AT&T Cricket	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	6.1" diag. 19.5 : 9	3.2" diag. 5 : 3	?	?
Display Resolution & Type	240 x 320 pixels LCD (TFT/TFD)	720 x 1560 pixels (~282 ppi) LCD (TFT/TFD)	320 x 480 pixels (~180 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	240 x 320 pixels LCD (TFT/TFD)
Display Refresh	?	60 Hz	60 Hz	?	?
Battery	?	3,000 mAh	1,500 mAh	?	1,490 mAh
Processor	?	2 GHz MediaTek Helio A22 (MT6761WB)	800 MHz Qualcomm MSM7627A	?	400 MHz Intel XScale
RAM	?	3 GB	512 MB	?	?
Storage	? raw hardware	64 GB	2 GB	? raw hardware	? raw hardware
Main Camera	1 megapixel	8 megapixel	3 megapixel	Yes	Yes
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	?	?	?	QCIF (176 x 144)
Front Camera	-	5 megapixel	-	-	-
Weight	3.9 oz (111g)	5.64 oz (160g)	4.6 oz (130g)	3.46 oz (98g)	7.41 oz (210g)
Dimensions	3.86" x 2.01" x 0.57" (98 x 51 x 14.5 mm)	6.11" x 2.87" x 0.34" (155 x 73 x 8.6 mm)	4.8" x 2.3" x 0.5" (122 x 58 x 12.7 mm)	3.27" x 1.81" x 0.94" (83 x 46 x 23.9 mm)	4.92" x 2.83" x 0.75" (125 x 72 x 19.1 mm)
Form Factor	Clamshell	Slab	Slab	Clamshell	Slide
Platform / OS	(proprietary)	Android	Android	(proprietary)	Windows Mobile Professional
Network Bands	CDMA: 850, 1900	4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30, 66 WCDMA: 1, 2, 4, 5, 8	CDMA: 850, 1700, 1900	GSM: 850, 900, 1800, 1900	GSM: 850, 900, 1800, 1900
Data Technology	EVDO r0	LTE (Cat 4)	EVDO rA	GPRS	GPRS
Features
Flashlight	-	Yes	-	-	-
GPS / Location	Yes	n/a	n/a	-	n/a
Accessibility
Hearing Aid Compatible	-	Yes M4, T4 (very tele-coil compatible)	Yes M4, T4 (very tele-coil compatible)	-	-
Multiple Languages	Yes	n/a	n/a	Yes	n/a
TTY/TDD (Digital)	Yes	-	Yes	Yes	-
Alerts
Extra Display	Yes	-	-	Yes	-
Ringer Profiles	-	-	-	Yes	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Infrared (IR)	-	-	-	Yes	Yes
Mobile Hotspot	-	n/a	n/a	-	n/a
USB	Yes	Yes USB Type C	Yes Micro-USB	Yes	Yes
Wi-Fi	-	Yes 5 (802.11 a,ac,b,g,n)	Yes 4 (802.11 b,g,n)	-	Yes
Contacts
Picture ID	Yes	n/a	n/a	Yes	n/a
Ringer ID	Yes	n/a	n/a	Yes	n/a
Voice Dialing	Yes	n/a	n/a	Yes	n/a
Customization
Changeable Body Plates	-	-	-	Yes	-
Custom Graphics	Yes	n/a	n/a	Yes	n/a
Custom Ringtones	Yes	n/a	n/a	Yes	n/a
Real-Music Ringers	-	n/a	n/a	Yes	n/a
Data & Network
Data Tethering	Yes	n/a	n/a	Yes	n/a
WAP / Web Browser	Yes	n/a	n/a	Yes	n/a
Input
Predictive Text Entry	Yes	n/a	n/a	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	Yes	-	Yes
Touch Screen	-	Yes Capacitive	Yes Capacitive	-	Yes
Memory
Memory Card Slot	-	Yes	Yes	-	Yes
Messaging
Email Client	-	n/a	n/a	Yes	n/a
EMS / Picture Messaging	-	n/a	n/a	Yes	n/a
Instant Messaging	-	n/a	n/a	-	n/a
MMS	-	n/a	n/a	Yes	n/a
Text Messaging Templates	Yes	n/a	n/a	Yes	n/a
Music
Headphone Jack (3.5mm)	-	Yes	Yes	-	-
Music Player	Yes	n/a	n/a	-	n/a
Power
Fast Charging	-	Yes	-	-	-
Productivity
Alarm	Yes	n/a	n/a	Yes	n/a
Calculator	Yes	n/a	n/a	Yes	n/a
Calendar	Yes	n/a	n/a	Yes	n/a
To-Do List	Yes	n/a	n/a	Yes	n/a
Voice Memo	Yes	n/a	n/a	Yes	n/a
Software
Games	Yes	n/a	n/a	Yes	n/a
Java (J2ME)	Yes	n/a	n/a	Yes	n/a
Voice
HD Voice	-	Yes	-	-	-
Headset Jack (2.5 mm)	Yes	n/a	n/a	-	n/a
Push-To-Talk	-	-	-	Yes *	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung MM-A900 / SPH-A900 / Ace	Cricket Debut S2 / AT&T Calypso 4	Huawei Ascend Q	Sony Ericsson Z520 / Z525	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	Samsung MM-A900 / SPH-A900 / Ace	Cricket Debut S2 / AT&T Calypso 4	Huawei Ascend Q	Sony Ericsson Z520 / Z525	Siemens SX66 / MDA III / PDA2K (HTC Blue Angel)