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Phone Pantech Duo C810 Samsung Galaxy S6 (GSM) Alcatel 665 Alcatel Pop Star ZTE Z221
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.2" diag.
4 : 3
5.1" diag.
16 : 9
1.8" diag.
4 : 3
4" diag.
5 : 3
2" diag.
4 : 3
Display Resolution & Type 240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
128 x 160 pixels
(~116 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? 60 Hz ?
Battery 1,320 mAh 2,550 mAh 650 mAh 2,000 mAh 900 mAh
Processor ARM 920t PXA27x 2.1 GHz Samsung Exynos 7420 ? 1.2 GHz Qualcomm Snapdragon 400 (MSM8926) ?
RAM ? 3 GB 16 MB 1 GB ?
Storage ? raw hardware 32 GB * 32 MB 4 GB 142 MB
Main Camera 1 megapixel 16 megapixel 2 megapixel 5 megapixel Yes
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture QVGA (320 x 240) 4K UHD QCIF (176 x 144) 1080p HD QCIF (176 x 144)
Front Camera - 5 megapixel - Yes -
Weight 3.88 oz
(110g)
4.87 oz
(138g)
2.72 oz
(77g)
4.6 oz
(130g)
3.24 oz
(92g)
Dimensions 4.01" x 1.97" x 0.78"
(102 x 50 x 19.8 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
3.78" x 1.89" x 0.66"
(96 x 48 x 16.8 mm)
4.84" x 2.5" x 0.38"
(123 x 64 x 9.7 mm)
3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
Form Factor Slide Slab Clamshell Slab Clamshell
Platform / OS Windows Mobile Standard Android (proprietary) Android (proprietary)
Network Bands

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

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

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

GSM: 850, 1900

4G LTE: 4, 17

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

Data Technology HSDPA 1.8 LTE (Cat 6) - LTE (Cat 3) HSDPA 3.6
Features 
Fingerprint Reader - Yes - - -
Flashlight - Yes - Yes -
GPS / Location n/a n/a - n/a Yes
VR-ready - Yes - - -
Accessibility
Adjustable Text Size n/a n/a - n/a -
Hearing Aid Compatible - Yes Yes Yes Yes
Multiple Languages n/a n/a Yes n/a Yes
TTY/TDD (Digital) - Yes - Yes Yes
Alerts
Extra Display - - Yes - Yes
Ringer Profiles Yes - Yes - Yes
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Infrared (IR) - Yes - - -
MirrorLink - Yes - - -
NFC - Yes - - -
USB Yes Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Yes
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
- Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID n/a n/a Yes n/a -
Ringer ID n/a n/a Yes n/a -
Voice Dialing n/a n/a - n/a -
Customization
Custom Graphics n/a n/a Yes n/a Yes
Custom Ringtones n/a n/a Yes n/a Yes
Real-Music Ringers n/a n/a Yes n/a Yes
Data & Network
Data Tethering n/a n/a - n/a -
WAP / Web Browser n/a n/a Yes n/a Yes
Input
Predictive Text Entry n/a n/a Yes n/a Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen - 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 Yes n/a Yes
MMS n/a n/a Yes n/a Yes
Text Messaging Templates n/a n/a Yes n/a Yes
Music
FM Radio - - Yes Yes -
Headphone Jack (3.5mm) - Yes Yes Yes -
Music Player n/a 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 n/a Yes n/a Yes
Calculator n/a n/a Yes n/a Yes
Calendar n/a n/a Yes n/a Yes
To-Do List n/a n/a - n/a -
Voice Memo n/a n/a Yes n/a Yes
Software
Games n/a n/a Yes n/a Yes
Java (J2ME) n/a n/a Yes n/a Yes
Voice
HD Voice - Yes - - -
Speaker Phone Yes Yes Yes Yes Yes
  Pantech Duo C810 Samsung Galaxy S6 (GSM) Alcatel 665 Alcatel Pop Star ZTE Z221
  X > < X > < X > < X > < X

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

 
Phone Pantech Duo C810 Samsung Galaxy S6 (GSM) Alcatel 665 Alcatel Pop Star ZTE Z221

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