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Phone	Nokia E66	Motorola Droid X	Nokia 3555	Samsung VI-A820	Asus ZenFone 4
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	2.4" diag. 4 : 3	4.3" diag. 16 : 9	1.8" diag. 4 : 3	?	5.5" diag. 16 : 9
Display Resolution & Type	240 x 320 pixels (~167 ppi) LCD (TFT/TFD)	480 x 854 pixels (~228 ppi) LCD (TFT/TFD)	128 x 160 pixels (~114 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (STN)	1080 x 1920 pixels (~401 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	60 Hz
Battery	1,000 mAh	1,540 mAh	?	1,000 mAh	3,300 mAh
Processor	?	1 GHz TI OMAP 3630 (ARM Cortex A8)	?	?	2.2 GHz Qualcomm Snapdragon 630
RAM	?	?	?	?	4 GB
Storage	? raw hardware	8 GB	? raw hardware	? raw hardware	64 GB
Main Camera	3 megapixel	8 megapixel	Yes	-	12 megapixel
Wide Camera	-	-	-	-	Yes
Tele Camera	-	-	-	-	-
Video Capture	QVGA (320 x 240)	720p HD	QCIF (176 x 144)	-	4K UHD
Front Camera	-	-	-	-	8 megapixel
Weight	4.27 oz (121g)	5.47 oz (155g)	3.32 oz (94g)	3.14 oz (89g)	5.47 oz (155g)
Dimensions	4.21" x 1.93" x 0.51" (107 x 49 x 13 mm)	5" x 2.6" x 0.4" (127 x 66 x 10.2 mm)	3.94" x 1.75" x 0.83" (100 x 44 x 21 mm)	3.56" x 1.88" x 1.06" (90 x 48 x 26.9 mm)	6.12" x 2.96" x 0.3" (155 x 75 x 7.7 mm)
Form Factor	Slide	Slab	Clamshell	Clamshell	Slab
Platform / OS	S60 (Symbian)	Android	(proprietary)	(proprietary)	Android
Network Bands	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900	WCDMA: 4 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900 AMPS: 850	4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 28 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900
Data Technology	HSDPA 3.6	EVDO rA	WCDMA (UMTS)	1xRTT	LTE (Cat 12)
Features
Fingerprint Reader	-	-	-	-	Yes stand-alone
Flashlight	-	-	-	-	Yes
GPS / Location	n/a	n/a	-	Yes	n/a
Accessibility
Hearing Aid Compatible	-	Yes	Yes *	-	Yes
Multiple Languages	n/a	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	-	Yes	-	Yes	-
Alerts
Extra Display	-	-	Yes	Yes	-
Ringer Profiles	Yes	-	Yes	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	-	Yes
Infrared (IR)	Yes	-	-	-	-
Mobile Hotspot	n/a	n/a	-	-	n/a
NFC	-	-	-	-	Yes
USB	Yes Micro-USB	Yes	Yes	-	Yes USB Type C
Wi-Fi	Yes 802.11 b,g	Yes	-	-	Yes 5 (802.11 a,ac,b,g,n)
Contacts
Picture ID	n/a	n/a	Yes	Yes	n/a
Ringer ID	n/a	n/a	Yes	Yes	n/a
Voice Dialing	n/a	n/a	Yes	Yes	n/a
Customization
Custom Graphics	n/a	n/a	Yes	Yes	n/a
Custom Ringtones	n/a	n/a	Yes	Yes	n/a
Real-Music Ringers	n/a	n/a	Yes	-	n/a
Data & Network
Data Tethering	n/a	n/a	-	-	n/a
Dual-SIM	-	-	-	-	Yes
WAP / Web Browser	n/a	n/a	Yes	Yes	n/a
Input
Predictive Text Entry	n/a	n/a	Yes	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	-	Yes	-	-	Yes
Memory
Memory Card Slot	Yes	Yes	Yes	-	Yes
Messaging
Email Client	n/a	n/a	-	-	n/a
Instant Messaging	n/a	n/a	Yes *	-	n/a
MMS	n/a	n/a	Yes	-	n/a
Text Messaging Templates	n/a	n/a	Yes	-	n/a
Music
FM Radio	Yes	Yes	-	-	-
Headphone Jack (3.5mm)	-	Yes	-	-	Yes
Music Player	n/a	n/a	Yes	-	n/a
Photo & Video
DLNA	-	Yes	-	-	-
Miracast	-	-	-	-	Yes
TV Output	-	Yes	-	-	-
Video Calling	n/a	n/a	-	-	n/a
Power
Fast Charging	-	-	-	-	Yes
Productivity
Alarm	n/a	n/a	Yes	Yes	n/a
Calculator	n/a	n/a	Yes	Yes	n/a
Calendar	n/a	n/a	Yes	Yes	n/a
To-Do List	n/a	n/a	Yes	Yes	n/a
Voice Memo	n/a	n/a	Yes	Yes	n/a
Software
Games	n/a	n/a	Yes	Yes	n/a
Java (J2ME)	n/a	n/a	Yes	Yes	n/a
Voice
Headset Jack (2.5 mm)	n/a	n/a	Yes	Yes	n/a
Push-To-Talk	-	-	-	Yes	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Nokia E66	Motorola Droid X	Nokia 3555	Samsung VI-A820	Asus ZenFone 4
	X >	< X >	< X >	< X >	< X

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


Phone	Nokia E66	Motorola Droid X	Nokia 3555	Samsung VI-A820	Asus ZenFone 4