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Phone	HTC Droid Eris	ZTE Maven 3 / Overture 3 / Prelude+	ZTE C88	AT&T Maestro 3	Apple iPhone 4 (CDMA)
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	3.2" diag. 5 : 3	5" diag. 16 : 9	2" diag. 4 : 3	6.5" diag. 20 : 9	3.5" diag. 5 : 3
Display Resolution & Type	320 x 480 pixels (~180 ppi) LCD (TFT/TFD)	480 x 854 pixels (~196 ppi) LCD (TFT/TFD)	176 x 220 pixels (~141 ppi) LCD (TFT/TFD)	720 x 1600 pixels (~270 ppi) LCD (TFT/TFD)	640 x 960 pixels (~330 ppi) LCD (TFT/TFD)
Display Refresh	60 Hz	60 Hz	?	60 Hz	60 Hz
Battery	1,300 mAh	2,070 mAh	800 mAh	3,900 mAh	?
Processor	528 MHz MSM7600	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)	?	2 GHz MediaTek Helio A22 (MT6761)	?
RAM	?	2 GB *	?	3 GB	?
Storage	? raw hardware	16 GB *	? raw hardware	32 GB	8 GB *
Main Camera	5 megapixel	5 megapixel	Yes	13 megapixel	5 megapixel
Wide Camera	-	-	-	5 megapixel	-
Tele Camera	-	-	-	-	-
Video Capture	CIF (352 x 288)	720p HD	-	1080p HD	720p HD
Front Camera	-	2 megapixel	-	5 megapixel	Yes
Weight	4.43 oz (126g)	5.53 oz (157g)	3.46 oz (98g)	6.24 oz (177g)	4.8 oz (136g)
Dimensions	4.45" x 2.19" x 0.52" (113 x 55 x 13.2 mm)	5.73" x 2.85" x 0.39" (146 x 72 x 9.9 mm)	3.85" x 1.92" x 0.7" (98 x 49 x 17.8 mm)	6.58" x 3.03" x 0.33" (167 x 77 x 8.4 mm)	4.5" x 2.31" x 0.37" (114 x 59 x 9.4 mm)
Form Factor	Slab	Slab	Clamshell	Slab	Slab
Platform / OS	Android	Android	(proprietary)	Android	iOS
Network Bands	CDMA: 850, 1900	4G LTE: 2, 4, 5, 12 WCDMA: 2, 4, 5 GSM: 850, 1900	CDMA: 850, 1900	4G LTE: 2, 4, 5, 12, 14, 30	CDMA: 850, 1900
Data Technology	EVDO rA	LTE (Cat 4)	1xRTT	LTE (Cat 4)	EVDO rA
Features
Barometer	-	-	-	Yes	-
Fingerprint Reader	-	-	-	Yes stand-alone	-
Flashlight	-	Yes	-	Yes	-
GPS / Location	n/a	n/a	Yes	n/a	n/a
Accessibility
Adjustable Text Size	n/a	n/a	-	n/a	n/a
Hearing Aid Compatible	Yes	Yes	-	Yes	Yes
Multiple Languages	n/a	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	-	-
Alerts
Extra Display	-	-	Yes	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Mobile Hotspot	n/a	n/a	-	n/a	n/a
USB	Yes Mini-USB	Yes Micro-USB	Yes Micro-USB	Yes USB Type C	Yes
Wi-Fi	Yes 802.11 b,g	Yes 4 (802.11 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	n/a
Ringer ID	n/a	n/a	Yes	n/a	n/a
Voice Dialing	n/a	n/a	Yes	n/a	n/a
Customization
Custom Graphics	n/a	n/a	Yes	n/a	n/a
Custom Ringtones	n/a	n/a	Yes	n/a	n/a
Real-Music Ringers	n/a	n/a	Yes	n/a	n/a
Data & Network
WAP / Web Browser	n/a	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	n/a	n/a	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	Yes	Yes	-	Yes	Yes
Memory
Memory Card Slot	Yes	Yes	-	Yes	-
Messaging
Email Client	n/a	n/a	Yes	n/a	n/a
Instant Messaging	n/a	n/a	Yes	n/a	n/a
MMS	n/a	n/a	Yes	n/a	n/a
Text Messaging Templates	n/a	n/a	Yes	n/a	n/a
Music
FM Radio	-	Yes	-	-	-
Headphone Jack (3.5mm)	Yes	Yes	-	Yes	Yes
Music Player	n/a	n/a	-	n/a	n/a
Photo & Video
TV Output	-	-	-	-	Yes
Video Calling	n/a	n/a	-	n/a	n/a
Productivity
Alarm	n/a	n/a	Yes	n/a	n/a
Calculator	n/a	n/a	Yes	n/a	n/a
Calendar	n/a	n/a	Yes	n/a	n/a
Voice Memo	n/a	n/a	Yes	n/a	n/a
Software
BREW	n/a	n/a	Yes	n/a	n/a
Games	n/a	n/a	Yes	n/a	n/a
Voice
HD Voice	-	Yes	-	Yes	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	HTC Droid Eris	ZTE Maven 3 / Overture 3 / Prelude+	ZTE C88	AT&T Maestro 3	Apple iPhone 4 (CDMA)
	X >	< X >	< X >	< X >	< X

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


Phone	HTC Droid Eris	ZTE Maven 3 / Overture 3 / Prelude+	ZTE C88	AT&T Maestro 3	Apple iPhone 4 (CDMA)