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Phone	Ericsson R520	AT&T Maestro 3	Asus ZenFone 4	Apple iPhone 4 (GSM)	Sanyo Incognito SCP-6760
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	6.5" diag. 20 : 9	5.5" diag. 16 : 9	3.5" diag. 5 : 3	2.6" diag. 4 : 3
Display Resolution & Type	?	720 x 1600 pixels (~270 ppi) LCD (TFT/TFD)	1080 x 1920 pixels (~401 ppi) LCD (TFT/TFD)	640 x 960 pixels (~330 ppi) LCD (TFT/TFD)	320 x 240 pixels (~154 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	60 Hz	60 Hz	?
Battery	?	3,900 mAh	3,300 mAh	?	840 mAh
Processor	?	2 GHz MediaTek Helio A22 (MT6761)	2.2 GHz Qualcomm Snapdragon 630	Apple A4	?
RAM	?	3 GB	4 GB	?	?
Storage	? raw hardware	32 GB	64 GB	32 GB *	? raw hardware
Main Camera	-	13 megapixel	12 megapixel	5 megapixel	2 megapixel
Wide Camera	-	5 megapixel	Yes	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	1080p HD	4K UHD	720p HD	QCIF (176 x 144)
Front Camera	-	5 megapixel	8 megapixel	Yes	-
Weight	4.23 oz (120g)	6.24 oz (177g)	5.47 oz (155g)	4.8 oz (136g)	4.23 oz (120g)
Dimensions	5.12" x 1.97" x 0.63" (130 x 50 x 16 mm)	6.58" x 3.03" x 0.33" (167 x 77 x 8.4 mm)	6.12" x 2.96" x 0.3" (155 x 75 x 7.7 mm)	4.5" x 2.31" x 0.37" (114 x 59 x 9.4 mm)	4.2" x 2.2" x 0.7" (107 x 56 x 17.8 mm)
Form Factor	Slab	Slab	Slab	Slab	Clamshell
Platform / OS	(proprietary)	Android	Android	iOS	(proprietary)
Network Bands	GSM: 900, 1800, 1900	4G LTE: 2, 4, 5, 12, 14, 30	4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 28 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900	WCDMA: 1, 2, 5, 8 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900
Data Technology	GPRS	LTE (Cat 4)	LTE (Cat 12)	HSPA 7.2	EVDO r0
Features
Barometer	-	Yes	-	-	-
Fingerprint Reader	-	Yes stand-alone	Yes stand-alone	-	-
Flashlight	-	Yes	Yes	-	-
GPS / Location	-	n/a	n/a	n/a	Yes
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a	Yes
Hearing Aid Compatible	-	Yes	Yes	Yes	Yes
Multiple Languages	Yes	n/a	n/a	n/a	Yes
TTY/TDD (Digital)	-	-	-	Yes	Yes
Alerts
Extra Display	-	-	-	-	Yes
Ringer Profiles	Yes	-	-	-	-
Connectivity
Bluetooth	Yes HSP, Sync, OPP, DUN	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio
Infrared (IR)	Yes	-	-	-	-
Mobile Hotspot	-	n/a	n/a	n/a	-
NFC	-	-	Yes	-	-
USB	-	Yes USB Type C	Yes USB Type C	Yes	Yes Micro-USB
Wi-Fi	-	Yes 5 (802.11 a,ac,b,g,n)	Yes 5 (802.11 a,ac,b,g,n)	Yes 4 (802.11 b,g,n)	-
Contacts
Picture ID	-	n/a	n/a	n/a	Yes
Ringer ID	-	n/a	n/a	n/a	Yes
Voice Dialing	Yes	n/a	n/a	n/a	Yes
Customization
Custom Graphics	-	n/a	n/a	n/a	Yes
Custom Ringtones	Yes	n/a	n/a	n/a	Yes
Real-Music Ringers	-	n/a	n/a	n/a	Yes
Data & Network
Data Tethering	Yes	n/a	n/a	n/a	-
Dual-SIM	-	-	Yes	-	-
WAP / Web Browser	Yes	n/a	n/a	n/a	Yes
Input
Predictive Text Entry	Yes	n/a	n/a	n/a	Yes
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	-	Yes	Yes	Yes	-
Memory
Memory Card Slot	-	Yes	Yes	-	Yes
Messaging
Email Client	-	n/a	n/a	n/a	Yes
Instant Messaging	-	n/a	n/a	n/a	Yes
MMS	-	n/a	n/a	n/a	Yes
Text Messaging Templates	Yes	n/a	n/a	n/a	Yes
Music
Headphone Jack (3.5mm)	-	Yes	Yes	Yes	-
Music Player	-	n/a	n/a	n/a	Yes
Photo & Video
Miracast	-	-	Yes	-	-
TV Output	-	-	-	Yes	-
Power
Fast Charging	-	-	Yes	-	-
Productivity
Alarm	Yes	n/a	n/a	n/a	Yes
Calculator	Yes	n/a	n/a	n/a	Yes
Calendar	Yes	n/a	n/a	n/a	Yes
To-Do List	-	n/a	n/a	n/a	Yes
Voice Memo	Yes	n/a	n/a	n/a	Yes
Software
Games	Yes	n/a	n/a	n/a	Yes
Java (J2ME)	-	n/a	n/a	n/a	Yes
Voice
HD Voice	-	Yes	-	-	-
Headset Jack (2.5 mm)	-	n/a	n/a	n/a	Yes
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Ericsson R520	AT&T Maestro 3	Asus ZenFone 4	Apple iPhone 4 (GSM)	Sanyo Incognito SCP-6760
	X >	< X >	< X >	< X >	< X

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


Phone	Ericsson R520	AT&T Maestro 3	Asus ZenFone 4	Apple iPhone 4 (GSM)	Sanyo Incognito SCP-6760