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Phone HTC One (M8) (GSM) Samsung Galaxy A02s HTC EVO 4G ZTE Z221
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 5" diag.
16 : 9
6.5" diag.
20 : 9
4.3" diag.
5 : 3
2" diag.
4 : 3
Display Resolution & Type 1080 x 1920 pixels
(~441 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~217 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz 60 Hz 60 Hz ?
Battery 2,600 mAh 5,000 mAh 1,500 mAh 900 mAh
Processor 2.3 GHz Qualcomm Snapdragon 801 (MSM8974AB) Qualcomm Snapdragon 450 1 GHz Qualcomm Snapdragon S1 QSD8650 ?
RAM 2 GB 2 GB ? ?
Storage 32 GB 32 GB ? raw hardware 142 MB
Main Camera 4 megapixel 13 megapixel 8 megapixel Yes
Wide Camera - - - -
Tele Camera - - - -
Video Capture 1080p HD 1080p HD 720p HD QCIF (176 x 144)
Front Camera 5 megapixel 5 megapixel Yes -
Weight 5.64 oz
(160g)
6.98 oz
(198g)
6 oz
(170g)
3.24 oz
(92g)
Dimensions 5.76" x 2.78" x 0.37"
(146 x 71 x 9.3 mm)
6.56" x 2.99" x 0.36"
(166 x 76 x 9.2 mm)
4.8" x 2.6" x 0.5"
(122 x 66 x 12.7 mm)
3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
Form Factor Slab Slab Slab Clamshell
Platform / OS Android Android Android (proprietary)
Network Bands

4G LTE: 2, 4, 5, 7, 17

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 7, 12, 13, 25, 26, 41, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

4G WiMAX: 41

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

Data Technology LTE (Cat 4) LTE (Cat 4) WiMAX HSDPA 3.6
Features 
Barometer - Yes - -
Flashlight Yes Yes - -
GPS / Location n/a n/a n/a Yes
Accessibility
Hearing Aid Compatible Yes Yes Yes Yes
Multiple Languages n/a n/a n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes
Alerts
Extra Display - - - Yes
Ringer Profiles - - - Yes
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Infrared (IR) Yes - - -
MirrorLink Yes - - -
Mobile Hotspot n/a n/a n/a -
NFC Yes - - -
USB Yes
Micro-USB
Yes
USB Type C
Yes Yes
Wi-Fi Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes
802.11 b,g
-
Contacts
Picture ID n/a n/a n/a -
Ringer ID n/a n/a n/a -
Voice Dialing n/a n/a n/a -
Customization
Custom Graphics n/a n/a n/a Yes
Custom Ringtones n/a n/a n/a Yes
Real-Music Ringers n/a n/a n/a Yes
Data & Network
Data Tethering n/a n/a n/a -
WAP / Web Browser n/a n/a n/a Yes
Input
Predictive Text Entry n/a n/a n/a Yes
Side Keys Yes Yes Yes Yes
Touch Screen Yes 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 n/a Yes
MMS n/a n/a n/a Yes
Text Messaging Templates n/a n/a n/a Yes
Music
FM Radio Yes - Yes -
Headphone Jack (3.5mm) Yes Yes Yes -
Music Player n/a n/a n/a -
Stereo Speakers Yes - - -
Photo & Video
DLNA Yes - - -
Miracast Yes - - -
TV Output Yes - Yes -
Power
Fast Charging Yes Yes - -
Productivity
Alarm n/a n/a n/a Yes
Calculator n/a n/a n/a Yes
Calendar n/a n/a n/a Yes
Voice Memo n/a n/a n/a Yes
Software
Games n/a n/a n/a Yes
Java (J2ME) n/a n/a n/a Yes
Voice
HD Voice Yes Yes - -
Speaker Phone Yes Yes Yes Yes
  HTC One (M8) (GSM) Samsung Galaxy A02s HTC EVO 4G ZTE Z221
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone HTC One (M8) (GSM) Samsung Galaxy A02s HTC EVO 4G ZTE Z221

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