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Phone	Ericsson T66	Samsung Memoir SGH-T929	Samsung SGH-X640	ZTE Engage LT / Engage MT	Samsung Galaxy S 4 (GSM)
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	3.1" diag. 5 : 3	?	4" diag. 5 : 3	5" diag. 16 : 9
Display Resolution & Type	?	240 x 400 pixels (~150 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	1080 x 1920 pixels (~441 ppi) AMOLED
Display Refresh	?	?	?	60 Hz	60 Hz
Battery	?	?	800 mAh	1,900 mAh	2,600 mAh
Processor	?	?	?	?	1.9 GHz Qualcomm Snapdragon 600 8064T
RAM	?	?	?	1 GB	2 GB
Storage	? raw hardware	? raw hardware	? raw hardware	4 GB	16 GB *
Main Camera	-	8 megapixel	Yes	3 megapixel	13 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	?	-	WVGA / 480p	1080p HD
Front Camera	-	-	-	Yes	2 megapixel
Weight	2.08 oz (59g)	4.4 oz (125g)	3 oz (85g)	5.09 oz (144g)	4.59 oz (130g)
Dimensions	3.62" x 1.61" x 0.69" (92 x 41 x 17.5 mm)	4.17" x 2.11" x 0.55" (106 x 54 x 14 mm)	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.78" x 2.54" x 0.46" (121 x 64 x 11.7 mm)	5.38" x 2.75" x 0.31" (137 x 70 x 7.9 mm)
Form Factor	Slab	Slab	Clamshell	Slab	Slab
Platform / OS	(proprietary)	(proprietary)	(proprietary)	Android	Android
Network Bands	GSM: 900, 1800, 1900	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900	GSM: 900, 1800, 1900	CDMA: 850, 1700, 1900	4G LTE: 2, 4, 5, 17 WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900 *
Data Technology	-	HSDPA 3.6	GPRS	EVDO rA	LTE (Cat 3)
Features
Flashlight	-	-	-	-	Yes
GPS / Location	-	Yes	-	n/a	n/a
Accessibility
Adjustable Text Size	-	-	-	n/a	n/a
Hearing Aid Compatible	-	Yes M3 (mostly compatible)	-	-	Yes M3 (mostly compatible)
Multiple Languages	Yes	Yes	Yes	n/a	n/a
TTY/TDD (Digital)	-	Yes	-	Yes	Yes
Alerts
Ringer Profiles	Yes	Yes	-	-	-
Connectivity
Bluetooth	-	Yes	-	Yes	Yes
Infrared (IR)	-	-	-	-	Yes
Mobile Hotspot	-	-	-	n/a	n/a
NFC	-	-	-	-	Yes
USB	-	Yes	-	Yes Micro-USB	Yes
Wi-Fi	-	-	-	Yes	Yes 5 (802.11 a,ac,b,g,n)
Contacts
Picture ID	-	Yes	Yes	n/a	n/a
Ringer ID	-	-	Yes	n/a	n/a
Voice Dialing	-	Yes	-	n/a	n/a
Customization
Custom Graphics	Yes	Yes	Yes	n/a	n/a
Custom Ringtones	Yes	Yes	Yes	n/a	n/a
Real-Music Ringers	-	Yes	-	n/a	n/a
Data & Network
Data Tethering	-	-	-	n/a	n/a
WAP / Web Browser	Yes	Yes	Yes	n/a	n/a
Input
Predictive Text Entry	Yes	Yes	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	-	Yes	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	Yes	-	Yes	Yes
Messaging
Email Client	-	Yes	-	n/a	n/a
EMS / Picture Messaging	Yes	-	Yes	n/a	n/a
Instant Messaging	-	Yes	-	n/a	n/a
MMS	-	Yes	Yes	n/a	n/a
Text Messaging Templates	Yes	Yes	Yes	n/a	n/a
Music
Headphone Jack (3.5mm)	-	-	-	Yes	Yes
Music Player	-	Yes	-	n/a	n/a
Photo & Video
DLNA	-	-	-	-	Yes
Miracast	-	-	-	-	Yes
TV Output	-	Yes	-	-	Yes
Productivity
Alarm	Yes	Yes	Yes	n/a	n/a
Calculator	Yes	Yes	Yes	n/a	n/a
Calendar	Yes	Yes	Yes	n/a	n/a
To-Do List	Yes	Yes	Yes	n/a	n/a
Voice Memo	-	Yes	Yes	n/a	n/a
Software
Games	Yes	Yes	Yes	n/a	n/a
Java (J2ME)	-	-	Yes	n/a	n/a
Voice
Headset Jack (2.5 mm)	-	-	Yes	n/a	n/a
Speaker Phone	-	Yes	Yes	Yes	Yes
	Ericsson T66	Samsung Memoir SGH-T929	Samsung SGH-X640	ZTE Engage LT / Engage MT	Samsung Galaxy S 4 (GSM)
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Ericsson T66	Samsung Memoir SGH-T929	Samsung SGH-X640	ZTE Engage LT / Engage MT	Samsung Galaxy S 4 (GSM)