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Phone AT&T Maestro 3 Samsung Glyde U940 Samsung Galaxy S6 (GSM) Samsung SCH-A570
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 6.5" diag.
20 : 9
2.8" diag.
16.5 : 9
5.1" diag.
16 : 9
?
Display Resolution & Type 720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
240 x 440 pixels
(~182 ppi)
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
128 x 160 pixels
LCD (STN)
Display Refresh 60 Hz ? 60 Hz ?
Battery 3,900 mAh 1,000 mAh 2,550 mAh ?
Processor 2 GHz MediaTek Helio A22 (MT6761) ? 2.1 GHz Samsung Exynos 7420 ?
RAM 3 GB ? 3 GB ?
Storage 32 GB ? raw hardware 32 GB * ? raw hardware
Main Camera 13 megapixel 2 megapixel 16 megapixel -
Wide Camera 5 megapixel - - -
Tele Camera - - - -
Video Capture 1080p HD QVGA (320 x 240) 4K UHD -
Front Camera 5 megapixel - 5 megapixel -
Weight 6.24 oz
(177g)
4.2 oz
(119g)
4.87 oz
(138g)
3.6 oz
(102g)
Dimensions 6.58" x 3.03" x 0.33"
(167 x 77 x 8.4 mm)
4.09" x 1.98" x 0.71"
(104 x 50 x 18 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
3.3" x 1.8" x 0.9"
(84 x 46 x 22.9 mm)
Form Factor Slab Slide Slab Clamshell
Platform / OS Android (proprietary) Android (proprietary)
Network Bands

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

CDMA: 850, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 29, 30

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

Data Technology LTE (Cat 4) EVDO r0 LTE (Cat 6) 1xRTT
Features 
Barometer Yes - - -
Fingerprint Reader Yes
stand-alone
- Yes -
Flashlight Yes - Yes -
GPS / Location n/a Yes n/a Yes
VR-ready - - Yes -
Accessibility
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
Yes
M4 (very compatible)
Yes
M3, T3 (mostly tele-coil compatible)
-
Multiple Languages n/a Yes n/a Yes
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Extra Display - - - Yes
Connectivity
Bluetooth Yes Yes Yes -
Infrared (IR) - - Yes -
MirrorLink - - Yes -
NFC - - Yes -
USB 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)
-
Contacts
Picture ID n/a Yes n/a -
Ringer ID n/a Yes n/a -
Voice Dialing n/a Yes n/a Yes
Customization
Custom Graphics n/a Yes n/a Yes
Custom Ringtones n/a Yes n/a Yes
Real-Music Ringers n/a Yes n/a -
Data & Network
Data Tethering n/a Yes n/a -
WAP / Web Browser n/a Yes n/a Yes
Input
Predictive Text Entry n/a Yes n/a Yes
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - Yes - -
Touch Screen Yes
Capacitive
Yes Yes
Capacitive
-
Memory
Memory Card Slot Yes Yes - -
Messaging
EMS / Picture Messaging n/a - n/a Yes
MMS n/a Yes n/a -
Text Messaging Templates n/a Yes n/a Yes
Music
Headphone Jack (3.5mm) Yes - Yes -
Music Player n/a Yes n/a -
Photo & Video
DLNA - - Yes -
Miracast - - Yes -
TV Output - - Yes -
Power
Fast Charging - - Yes -
Wireless Charging - - Yes -
Productivity
Alarm n/a Yes n/a Yes
Calculator n/a Yes n/a Yes
Calendar n/a Yes n/a Yes
To-Do List n/a - n/a Yes
Voice Memo n/a - n/a Yes
Software
BREW n/a Yes n/a Yes
Games n/a Yes n/a Yes
Voice
HD Voice Yes - Yes -
Headset Jack (2.5 mm) n/a Yes n/a Yes
Speaker Phone Yes Yes Yes -
  AT&T Maestro 3 Samsung Glyde U940 Samsung Galaxy S6 (GSM) Samsung SCH-A570
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone AT&T Maestro 3 Samsung Glyde U940 Samsung Galaxy S6 (GSM) Samsung SCH-A570

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