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Phone	Samsung SGH-X640	ZTE Engage LT / Engage MT	Samsung Galaxy J2 / J2 Pure / J2 Dash	Ericsson T66	Samsung Brightside
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	4" diag. 5 : 3	5" diag. 16 : 9	?	3.1" diag. 4 : 3
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	540 x 960 pixels (~220 ppi) LCD (TFT/TFD)	?	240 x 320 pixels (~129 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	60 Hz	?	?
Battery	800 mAh	1,900 mAh	2,600 mAh	?	1,000 mAh
Processor	?	?	1.4 GHz Samsung Exynos 7570	?	?
RAM	?	1 GB	2 GB	?	128 MB
Storage	? raw hardware	4 GB	16 GB	? raw hardware	256 MB
Main Camera	Yes	3 megapixel	8 megapixel	-	3 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	WVGA / 480p	1080p HD	-	QCIF (176 x 144)
Front Camera	-	Yes	5 megapixel	-	-
Weight	3 oz (85g)	5.09 oz (144g)	5.43 oz (154g)	2.08 oz (59g)	4.3 oz (122g)
Dimensions	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)	5.65" x 2.84" x 0.35" (144 x 72 x 8.9 mm)	3.62" x 1.61" x 0.69" (92 x 41 x 17.5 mm)	4.37" x 2.37" x 0.56" (111 x 60 x 14.2 mm)
Form Factor	Clamshell	Slab	Slab	Slab	Slide
Platform / OS	(proprietary)	Android	Android	(proprietary)	(proprietary)
Network Bands	GSM: 900, 1800, 1900	CDMA: 850, 1700, 1900	4G LTE: 2, 3, 4, 5, 7, 12, 14, 66, 71 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	GSM: 900, 1800, 1900	CDMA: 850, 1900
Data Technology	GPRS	EVDO rA	LTE (Cat 4)	-	EVDO r0
Features
Flashlight	-	-	Yes	-	-
GPS / Location	-	n/a	n/a	-	Yes
Accessibility
Adjustable Text Size	-	n/a	n/a	-	Yes
Hearing Aid Compatible	-	-	Yes M3, T3 (mostly tele-coil compatible)	-	Yes M4 (very compatible)
Multiple Languages	Yes	n/a	n/a	Yes	Yes
TTY/TDD (Digital)	-	Yes	Yes	-	Yes
Alerts
Ringer Profiles	-	-	-	Yes	-
Connectivity
Bluetooth	-	Yes	Yes	-	Yes
USB	-	Yes Micro-USB	Yes Micro-USB	-	Yes Micro-USB
Wi-Fi	-	Yes	Yes 4 (802.11 b,g,n)	-	-
Contacts
Picture ID	Yes	n/a	n/a	-	Yes
Ringer ID	Yes	n/a	n/a	-	Yes
Voice Dialing	-	n/a	n/a	-	Yes
Customization
Custom Graphics	Yes	n/a	n/a	Yes	Yes
Custom Ringtones	Yes	n/a	n/a	Yes	Yes
Real-Music Ringers	-	n/a	n/a	-	Yes
Data & Network
Data Tethering	-	n/a	n/a	-	Yes
WAP / Web Browser	Yes	n/a	n/a	Yes	Yes
Input
Predictive Text Entry	Yes	n/a	n/a	Yes	Yes
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
Messaging
Email Client	-	n/a	n/a	-	Yes
EMS / Picture Messaging	Yes	n/a	n/a	Yes	-
Instant Messaging	-	n/a	n/a	-	-
MMS	Yes	n/a	n/a	-	Yes
Text Messaging Templates	Yes	n/a	n/a	Yes	Yes
Music
Headphone Jack (3.5mm)	-	Yes	Yes	-	Yes
Music Player	-	n/a	n/a	-	Yes
Productivity
Alarm	Yes	n/a	n/a	Yes	Yes
Calculator	Yes	n/a	n/a	Yes	Yes
Calendar	Yes	n/a	n/a	Yes	Yes
To-Do List	Yes	n/a	n/a	Yes	-
Voice Memo	Yes	n/a	n/a	-	Yes
Software
BREW	-	n/a	n/a	-	Yes
Games	Yes	n/a	n/a	Yes	Yes
Java (J2ME)	Yes	n/a	n/a	-	-
Voice
Headset Jack (2.5 mm)	Yes	n/a	n/a	-	-
Speaker Phone	Yes	Yes	Yes	-	Yes
	Samsung SGH-X640	ZTE Engage LT / Engage MT	Samsung Galaxy J2 / J2 Pure / J2 Dash	Ericsson T66	Samsung Brightside
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Samsung SGH-X640	ZTE Engage LT / Engage MT	Samsung Galaxy J2 / J2 Pure / J2 Dash	Ericsson T66	Samsung Brightside