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Phone	Sony Ericsson Z550a	LG Spectrum	Ericsson R278d	LG Connect 4G	HTC myTouch 4G Slide
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	1.9" diag. 4 : 3	4.5" diag. 16 : 9	?	4" diag. 5 : 3	3.7" diag. 5 : 3
Display Resolution & Type	176 x 220 pixels (~148 ppi) LCD (TFT/TFD)	720 x 1280 pixels (~326 ppi) LCD (TFT/TFD)	101 x 40 pixels	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	480 x 800 pixels (~252 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	60 Hz	60 Hz
Battery	?	1,830 mAh	?	1,540 mAh	1,520 mAh
Processor	?	1.5 GHz Qualcomm Snapdragon S3	?	1.2 GHz Qualcomm Snapdragon S3 MSM8660	1.2 GHz Qualcomm Snapdragon S3 MSM8260 (dual-core)
RAM	?	1 GB	?	1 GB	?
Storage	? raw hardware	4 GB	? raw hardware	4 GB	? raw hardware
Main Camera	1 megapixel	8 megapixel	-	5 megapixel	8 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	1080p HD	-	720p HD	1080p HD
Front Camera	-	1 megapixel	-	Yes	Yes
Weight	3.26 oz (92g)	4.99 oz (141g)	9.28 oz (263g)	4.83 oz (137g)	6.5 oz (184g)
Dimensions	3.43" x 1.77" x 0.79" (87 x 45 x 20.1 mm)	5.33" x 2.71" x 0.42" (135 x 69 x 10.7 mm)	5.1" x 2" x 1" (130 x 51 x 25.4 mm)	4.59" x 2.45" x 0.46" (117 x 62 x 11.7 mm)	4.8" x 2.4" x 0.52" (122 x 61 x 13.2 mm)
Form Factor	Clamshell	Slab	Slab	Slab	Slide
Platform / OS	(proprietary)	Android	(proprietary)	Android	Android
Network Bands	GSM: 850, 900, 1800, 1900 *	4G LTE: 13 CDMA: 850, 1900 GSM: 850, 1900 *	TDMA: 850, 1900 AMPS: 850	4G LTE: 2, 4 CDMA: 850, 1700, 1900	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900
Data Technology	GPRS	LTE (Cat 3)	-	LTE (Cat 3)	HSPA 14.4
Features
GPS / Location	-	n/a	-	n/a	n/a
Accessibility
Hearing Aid Compatible	-	Yes M3 (mostly compatible)	-	Yes M4, T4 (very tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	-	Yes	-
Alerts
Extra Display	Yes	-	-	-	-
Ringer Profiles	Yes	-	Yes	-	-
Connectivity
Bluetooth	Yes	Yes	-	Yes	Yes
Mobile Hotspot	-	n/a	-	n/a	n/a
USB	Yes	Yes Micro-USB	-	Yes Micro-USB	Yes
Wi-Fi	-	Yes 4 (802.11 b,g,n)	-	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	Yes	n/a	-	n/a	n/a
Ringer ID	Yes	n/a	-	n/a	n/a
Voice Dialing	Yes	n/a	-	n/a	n/a
Customization
Custom Graphics	Yes	n/a	-	n/a	n/a
Custom Ringtones	Yes	n/a	Yes	n/a	n/a
Real-Music Ringers	Yes	n/a	-	n/a	n/a
Data & Network
Data Tethering	Yes	n/a	Yes	n/a	n/a
WAP / Web Browser	Yes	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	-	Yes Capacitive	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	-	Yes	Yes
Messaging
Email Client	Yes	n/a	-	n/a	n/a
Instant Messaging	-	n/a	-	n/a	n/a
MMS	Yes	n/a	-	n/a	n/a
Text Messaging Templates	Yes	n/a	-	n/a	n/a
Music
FM Radio	Yes	-	-	-	Yes
Headphone Jack (3.5mm)	-	Yes	-	Yes	Yes
Music Player	Yes	n/a	-	n/a	n/a
Photo & Video
DLNA	-	Yes	-	Yes	Yes
TV Output	-	Yes	-	-	Yes
Productivity
Alarm	Yes	n/a	Yes	n/a	n/a
Calculator	Yes	n/a	-	n/a	n/a
Calendar	Yes	n/a	-	n/a	n/a
To-Do List	Yes	n/a	-	n/a	n/a
Voice Memo	Yes	n/a	-	n/a	n/a
Software
Games	Yes	n/a	-	n/a	n/a
Java (J2ME)	Yes	n/a	-	n/a	n/a
Voice
Push-To-Talk	Yes *	-	-	-	-
Speaker Phone	Yes	Yes	-	Yes	Yes
	* Some versions only
	Sony Ericsson Z550a	LG Spectrum	Ericsson R278d	LG Connect 4G	HTC myTouch 4G Slide
	X >	< X >	< X >	< X >	< X

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


Phone	Sony Ericsson Z550a	LG Spectrum	Ericsson R278d	LG Connect 4G	HTC myTouch 4G Slide