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Phone ZTE Z998 / Unico LTE Samsung Knack U310 Samsung Gusto Samsung DoubleTime Kyocera KX12
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 4.5" diag.
16 : 9
2.2" diag.
4 : 3
2" diag.
4 : 3
3.2" diag.
5 : 3
?
Display Resolution & Type 540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~128 ppi)
LCD (TFT/TFD)
128 x 160 pixels
(~102 ppi)
LCD (TFT/TFD)
320 x 480 pixels
(~180 ppi)
LCD (TFT/TFD)
128 x 128 pixels
LCD (STN)
Display Refresh 60 Hz ? ? 60 Hz ?
Battery 2,070 mAh 1,000 mAh ? 1,200 mAh 1,800 mAh
Processor 1.2 GHz Qualcomm Snapdragon 400 MSM8930 ? ? 600 MHz Qualcomm ?
RAM 1 GB ? ? ? ?
Storage 4 GB ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera 5 megapixel - Yes 3 megapixel -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture 720p HD - - QVGA (320 x 240) -
Front Camera 1 megapixel - - - -
Weight 4.8 oz
(136g)
3.63 oz
(103g)
3.27 oz
(93g)
5.22 oz
(148g)
4.62 oz
(131g)
Dimensions 5.2" x 2.6" x 0.4"
(132 x 66 x 10.2 mm)
3.78" x 2.01" x 0.74"
(96 x 51 x 18.8 mm)
3.99" x 1.86" x 0.56"
(101 x 47 x 14.2 mm)
4.45" x 2.44" x 0.59"
(113 x 62 x 15 mm)
4.33" x 1.97" x 1.02"
(110 x 50 x 25.9 mm)
Form Factor Slab Clamshell Clamshell Clamshell Slab
Platform / OS Android (proprietary) (proprietary) Android (proprietary)
Network Bands

4G LTE: 2, 4, 5, 17

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

CDMA: 850, 1900

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

AMPS: 850

Data Technology LTE (Cat 3) - 1xRTT HSPA 7.2 1xRTT
Features 
Flashlight - - - - Yes
GPS / Location n/a Yes Yes n/a Yes
Ruggedized - - - - Yes
Accessibility
Adjustable Text Size n/a Yes Yes n/a -
Hearing Aid Compatible Yes Yes Yes Yes -
Multiple Languages n/a Yes Yes n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes Yes
Alerts
Extra Display - Yes Yes - -
Connectivity
Bluetooth Yes - Yes Yes -
Mobile Hotspot n/a - - n/a -
USB Yes
Micro-USB
- Yes
Micro-USB
Yes
Micro-USB
-
Wi-Fi Yes
4 (802.11 b,g,n)
- - Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID n/a - Yes n/a Yes
Ringer ID n/a - Yes n/a Yes
Voice Dialing n/a Yes 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 - - n/a -
Data & Network
Data Tethering n/a - - n/a Yes
WAP / Web Browser n/a - Yes n/a Yes
Input
Predictive Text Entry n/a Yes 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 -
Messaging
Email Client n/a - Yes n/a -
EMS / Picture Messaging n/a Yes - n/a Yes
Instant Messaging n/a - Yes n/a -
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 - - n/a -
Productivity
Alarm n/a Yes Yes n/a Yes
Calculator n/a Yes Yes n/a Yes
Calendar n/a Yes Yes n/a Yes
Voice Memo n/a - Yes n/a Yes
Software
BREW n/a - Yes n/a Yes *
Games n/a - Yes n/a Yes
Voice
Headset Jack (2.5 mm) n/a Yes Yes n/a Yes
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  ZTE Z998 / Unico LTE Samsung Knack U310 Samsung Gusto Samsung DoubleTime Kyocera KX12
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone ZTE Z998 / Unico LTE Samsung Knack U310 Samsung Gusto Samsung DoubleTime Kyocera KX12

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