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Specifications
	X >	< X >	< X >	< X >	< X

Phone	Ericsson R520	Samsung SCH-A610	AT&T Maestro 3	Asus ZenFone 4	Apple iPhone 4 (GSM)
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
Display Resolution & Type	?	128 x 160 pixels LCD (TFT/TFD)	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)
Display Refresh	?	?	60 Hz	60 Hz	60 Hz
Battery	?	1,300 mAh	3,900 mAh	3,300 mAh	?
Processor	?	?	2 GHz MediaTek Helio A22 (MT6761)	2.2 GHz Qualcomm Snapdragon 630	Apple A4
RAM	?	?	3 GB	4 GB	?
Storage	? raw hardware	? raw hardware	32 GB	64 GB	32 GB *
Main Camera	-	Yes	13 megapixel	12 megapixel	5 megapixel
Wide Camera	-	-	5 megapixel	Yes	-
Tele Camera	-	-	-	-	-
Video Capture	-	-	1080p HD	4K UHD	720p HD
Front Camera	-	-	5 megapixel	8 megapixel	Yes
Weight	4.23 oz (120g)	4.23 oz (120g)	6.24 oz (177g)	5.47 oz (155g)	4.8 oz (136g)
Dimensions	5.12" x 1.97" x 0.63" (130 x 50 x 16 mm)	3.5" x 1.9" x 0.9" (89 x 48 x 22.9 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)
Form Factor	Slab	Clamshell	Slab	Slab	Slab
Platform / OS	(proprietary)	(proprietary)	Android	Android	iOS
Network Bands	GSM: 900, 1800, 1900	CDMA: 850, 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
Data Technology	GPRS	1xRTT	LTE (Cat 4)	LTE (Cat 12)	HSPA 7.2
Features
Barometer	-	-	Yes	-	-
Fingerprint Reader	-	-	Yes stand-alone	Yes stand-alone	-
Flashlight	-	-	Yes	Yes	-
GPS / Location	-	Yes	n/a	n/a	n/a
Accessibility
Adjustable Text Size	-	-	n/a	n/a	n/a
Hearing Aid Compatible	-	-	Yes M4, T4 (very tele-coil compatible)	Yes M4, T3 (mostly tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	Yes	n/a	n/a	n/a
TTY/TDD (Digital)	-	-	-	-	Yes
Alerts
Ringer Profiles	Yes	-	-	-	-
Connectivity
Bluetooth	Yes	-	Yes	Yes	Yes
Infrared (IR)	Yes	-	-	-	-
Mobile Hotspot	-	-	n/a	n/a	n/a
NFC	-	-	-	Yes	-
USB	-	-	Yes USB Type C	Yes USB Type C	Yes
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	-	Yes	n/a	n/a	n/a
Ringer ID	-	Yes	n/a	n/a	n/a
Voice Dialing	Yes	Yes	n/a	n/a	n/a
Customization
Custom Graphics	-	Yes	n/a	n/a	n/a
Custom Ringtones	Yes	Yes	n/a	n/a	n/a
Real-Music Ringers	-	-	n/a	n/a	n/a
Data & Network
Data Tethering	Yes	Yes	n/a	n/a	n/a
Dual-SIM	-	-	-	Yes	-
WAP / Web Browser	Yes	Yes	n/a	n/a	n/a
Input
Predictive Text Entry	Yes	Yes	n/a	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	-	-	Yes Capacitive	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	-	Yes	Yes	-
Messaging
Email Client	-	-	n/a	n/a	n/a
EMS / Picture Messaging	-	Yes	n/a	n/a	n/a
MMS	-	Yes	n/a	n/a	n/a
Text Messaging Templates	Yes	Yes	n/a	n/a	n/a
Music
Headphone Jack (3.5mm)	-	-	Yes	Yes	Yes
Music Player	-	-	n/a	n/a	n/a
Photo & Video
Miracast	-	-	-	Yes	-
TV Output	-	-	-	-	Yes
Power
Fast Charging	-	-	-	Yes	-
Productivity
Alarm	Yes	Yes	n/a	n/a	n/a
Calculator	Yes	Yes	n/a	n/a	n/a
Calendar	Yes	Yes	n/a	n/a	n/a
To-Do List	-	Yes	n/a	n/a	n/a
Voice Memo	Yes	Yes	n/a	n/a	n/a
Software
BREW	-	Yes	n/a	n/a	n/a
Games	Yes	Yes	n/a	n/a	n/a
Voice
HD Voice	-	-	Yes	-	-
Headset Jack (2.5 mm)	-	Yes	n/a	n/a	n/a
Speaker Phone	Yes	-	Yes	Yes	Yes
	* Some versions only
	Ericsson R520	Samsung SCH-A610	AT&T Maestro 3	Asus ZenFone 4	Apple iPhone 4 (GSM)
	X >	< X >	< X >	< X >	< X

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


Phone	Ericsson R520	Samsung SCH-A610	AT&T Maestro 3	Asus ZenFone 4	Apple iPhone 4 (GSM)