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Phone ZTE Groove Samsung Galaxy S II, Epic 4G Touch ZTE Speed AT&T Maestro 3
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 3.2" diag.
5 : 3
4.5" diag.
5 : 3
4.5" diag.
16 : 9
6.5" diag.
20 : 9
Display Resolution & Type 320 x 480 pixels
(~180 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~206 ppi)
AMOLED
540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz 60 Hz 60 Hz 60 Hz
Battery 1,500 mAh 1,800 mAh 2,000 mAh 3,900 mAh
Processor 800 MHz Qualcomm MSM7627A 1.2 GHz Samsung Exynos C210 dual-core 1.2 GHz Qualcomm Snapdragon 410 MSM8916 2 GHz MediaTek Helio A22 (MT6761)
RAM 512 MB ? 1 GB 3 GB
Storage 1 GB 16 GB 8 GB 32 GB
Main Camera 3 megapixel 8 megapixel 5 megapixel 13 megapixel
Wide Camera - - - 5 megapixel
Tele Camera - - - -
Video Capture 720p HD 1080p HD 720p HD 1080p HD
Front Camera Yes 2 megapixel 2 megapixel 5 megapixel
Weight 4.5 oz
(128g)
4.55 oz
(129g)
4.8 oz
(136g)
6.24 oz
(177g)
Dimensions 4.67" x 2.46" x 0.55"
(119 x 62 x 14 mm)
5.1" x 2.7" x 0.38"
(130 x 69 x 9.6 mm)
5.3" x 2.6" x 0.4"
(135 x 66 x 10.2 mm)
6.58" x 3.03" x 0.33"
(167 x 77 x 8.4 mm)
Platform / OS Android Android Android Android
Network Bands

CDMA: 850, 1700, 1900

4G WiMAX: 41

CDMA: 800, 850, 1900

*

4G LTE: 25, 26, 41

CDMA: 800, 850, 1900

4G LTE: 2, 4, 5, 12, 14, 30

Data Technology EVDO rA WiMAX LTE (Cat 3) LTE (Cat 4)
Features 
Barometer - - - Yes
Fingerprint Reader - - - Yes
stand-alone
Flashlight - - - Yes
Accessibility
Hearing Aid Compatible - Yes Yes Yes
TTY/TDD (Digital) - Yes Yes -
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
USB Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Yes
USB Type C
Wi-Fi Yes Yes
4 (802.11 a,b,g,n)
Yes
4 (802.11 b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Input
Side Keys Yes Yes Yes Yes
Touch Screen Yes Yes Yes Yes
Memory
Memory Card Slot Yes Yes Yes Yes
Music
Headphone Jack (3.5mm) Yes Yes Yes Yes
Photo & Video
DLNA - Yes - -
TV Output - Yes - -
Voice
HD Voice - - Yes Yes
Speaker Phone Yes Yes Yes Yes
  ZTE Groove Samsung Galaxy S II, Epic 4G Touch ZTE Speed AT&T Maestro 3
  X > < X > < X > < X

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

 
Phone ZTE Groove Samsung Galaxy S II, Epic 4G Touch ZTE Speed AT&T Maestro 3

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