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Phone CAT S61 ZTE Z431 / Altair Siemens SK65 HTC Windows Phone 8S
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 5.2" diag.
16 : 9
2.4" diag.
4 : 3
? 4" diag.
5 : 3
Display Resolution & Type 1080 x 1920 pixels
(~424 ppi)
LCD (TFT/TFD)
320 x 240 pixels
(~167 ppi)
LCD (TFT/TFD)
132 x 176 pixels
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz ? ? ?
Battery 4,500 mAh 1,000 mAh 750 mAh 1,700 mAh
Processor 2.2 GHz Qualcomm Snapdragon 630 ? ? 1 GHz Qualcomm Snapdragon S4
RAM 4 GB ? ? 512 MB
Storage 64 GB ? raw hardware ? raw hardware 4 GB
Main Camera 16 megapixel 2 megapixel - 5 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture 4K UHD QVGA (320 x 240) - 720p HD
Front Camera 8 megapixel - - -
Weight 9.03 oz
(256g)
3.52 oz
(100g)
5.08 oz
(144g)
3.99 oz
(113g)
Dimensions 5.91" x 2.99" x 0.51"
(150 x 76 x 13 mm)
4.49" x 2.39" x 0.41"
(114 x 61 x 10.4 mm)
4.72" x 1.85" x 0.87"
(120 x 47 x 22.1 mm)
4.74" x 2.48" x 0.4"
(121 x 63 x 10.3 mm)
Form Factor Slab Slab Slab Slab
Platform / OS Android (proprietary) (proprietary) Windows
Network Bands

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 25, 26, 28, 29, 66

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

GSM: 900, 1800, 1900

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

Data Technology LTE (Cat 13) ? GPRS HSPA+ 21
Features 
Barometer Yes - - -
Flashlight Yes - - Yes
GPS / Location n/a Yes - n/a
Ruggedized Yes - - -
Water-Resistant Yes
IPX8 (SCUBA)
- - -
Accessibility
Hearing Aid Compatible Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
- Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages n/a Yes Yes n/a
TTY/TDD (Digital) - Yes - Yes
Alerts
Ringer Profiles - Yes - -
Connectivity
Bluetooth Yes Yes Yes Yes
Infrared (IR) - - Yes -
NFC Yes - - -
USB Yes
USB Type C
Yes
Micro-USB
Yes Yes
Wi-Fi Yes
5 (802.11 a,ac,b,g,n)
- - Yes
4 (802.11 b,g,n)
Contacts
Picture ID n/a Yes - n/a
Ringer ID n/a Yes - n/a
Customization
Custom Graphics n/a Yes Yes n/a
Custom Ringtones n/a Yes Yes n/a
Real-Music Ringers n/a Yes - n/a
Data & Network
Data Tethering n/a Yes Yes n/a
Dual-SIM Yes * - - -
WAP / Web Browser n/a Yes Yes n/a
Input
Predictive Text Entry n/a Yes - n/a
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - Yes Yes -
Touch Screen Yes - - Yes
Capacitive
Memory
Memory Card Slot Yes Yes - Yes
Messaging
Email Client n/a Yes Yes n/a
MMS n/a Yes Yes n/a
Text Messaging Templates n/a Yes - n/a
Music
FM Radio Yes - - -
Headphone Jack (3.5mm) Yes Yes - Yes
Music Player n/a Yes - n/a
Power
Fast Charging Yes - - -
Productivity
Alarm n/a Yes Yes n/a
Calculator n/a Yes Yes n/a
Calendar n/a Yes Yes n/a
To-Do List n/a - Yes n/a
Voice Memo n/a Yes Yes n/a
Software
BREW n/a Yes - n/a
Games n/a Yes Yes n/a
Java (J2ME) n/a - Yes n/a
Voice
Push-To-Talk - - Yes * -
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  CAT S61 ZTE Z431 / Altair Siemens SK65 HTC Windows Phone 8S
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Phone CAT S61 ZTE Z431 / Altair Siemens SK65 HTC Windows Phone 8S

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