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Phone	Samsung SCH-A990	Samsung Stratosphere / Galaxy Metrix 4G	Sony Ericsson Z550a	HTC Amaze 4G	ZTE Aspect
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	4" diag. 5 : 3	1.9" diag. 4 : 3	4.3" diag. 16 : 9	2.4" diag. 4 : 3
Display Resolution & Type	240 x 320 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) AMOLED	176 x 220 pixels (~148 ppi) LCD (TFT/TFD)	540 x 960 pixels (~256 ppi) LCD (TFT/TFD)	320 x 240 pixels (~167 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	60 Hz	?
Battery	1,000 mAh	?	?	1,730 mAh	1,000 mAh
Processor	?	1 GHz Samsung Cortex A8 Hummingbird	?	1.5 GHz Qualcomm Snapdragon S3 dual-core	230 MHz Qualcomm QSC6270
RAM	?	?	?	1 GB	128 MB
Storage	? raw hardware	? raw hardware	? raw hardware	16 GB	256 MB
Main Camera	3 megapixel	5 megapixel	1 megapixel	8 megapixel	2 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	WVGA / 480p	?	1080p HD	QVGA (320 x 240)
Front Camera	-	1 megapixel	-	2 megapixel	-
Weight	4.4 oz (125g)	5.8 oz (164g)	3.26 oz (92g)	6.1 oz (173g)	3.7 oz (105g)
Dimensions	3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm)	4.96" x 2.54" x 0.55" (126 x 65 x 14 mm)	3.43" x 1.77" x 0.79" (87 x 45 x 20.1 mm)	5.12" x 2.58" x 0.46" (130 x 66 x 11.7 mm)	4.55" x 2.4" x 0.45" (116 x 61 x 11.4 mm)
Form Factor	Clamshell	Slide	Clamshell	Slab	Slab
Platform / OS	(proprietary)	Android	(proprietary)	Android	(proprietary)
Network Bands	CDMA: 850, 1900	4G LTE: 13 CDMA: 850, 1900 *	GSM: 850, 900, 1800, 1900 *	WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	WCDMA: 2, 4 GSM: 850, 900, 1800, 1900
Data Technology	EVDO r0	LTE (Cat 3)	GPRS	HSPA+ 42	WCDMA (UMTS)
Features
Flashlight	Yes	-	-	Yes	-
GPS / Location	Yes	n/a	-	n/a	Yes
Accessibility
Hearing Aid Compatible	Yes M3 (mostly compatible)	Yes M4 (very 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	Yes
Alerts
Extra Display	Yes	-	Yes	-	-
Ringer Profiles	-	-	Yes	-	Yes
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Mobile Hotspot	-	n/a	-	n/a	-
NFC	-	-	-	Yes	-
USB	Yes	Yes	Yes	Yes	Yes Micro-USB
Wi-Fi	-	Yes 4 (802.11 a,b,g,n)	-	Yes 4 (802.11 a,b,g,n)	-
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
Touch Screen	-	Yes Capacitive	-	Yes Capacitive	-
Memory
Memory Card Slot	Yes	Yes	Yes	Yes	Yes
Messaging
Email Client	-	n/a	Yes	n/a	Yes
EMS / Picture Messaging	Yes	n/a	-	n/a	-
Instant Messaging	-	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	Yes	-
Headphone Jack (3.5mm)	-	Yes	-	Yes	Yes
Music Player	Yes	n/a	Yes	n/a	Yes
Stereo Speakers	Yes	-	-	-	-
Photo & Video
DLNA	-	Yes	-	Yes	-
TV Output	Yes	-	-	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	-	n/a	Yes	n/a	-
Voice Memo	Yes	n/a	Yes	n/a	Yes
Software
BREW	Yes	n/a	-	n/a	-
Games	Yes	n/a	Yes	n/a	Yes
Java (J2ME)	-	n/a	Yes	n/a	Yes
Voice
Push-To-Talk	-	-	Yes *	-	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung SCH-A990	Samsung Stratosphere / Galaxy Metrix 4G	Sony Ericsson Z550a	HTC Amaze 4G	ZTE Aspect
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SCH-A990	Samsung Stratosphere / Galaxy Metrix 4G	Sony Ericsson Z550a	HTC Amaze 4G	ZTE Aspect