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Phone Amazon Fire Sharp Aquos Crystal Samsung SGH-X640 Samsung SCH-A990
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 4.7" diag.
16 : 9
5" diag.
16 : 9
? ?
Display Resolution & Type 720 x 1280 pixels
(~312 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~294 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? ?
Battery 2,400 mAh 2,040 mAh 800 mAh 1,000 mAh
Processor 2.2 GHz Qualcomm Snapdragon 800 1.2 GHz Qualcomm Snapdragon 400 MSM8926 ? ?
RAM 2 GB 1.5 GB ? ?
Storage 32 GB * 8 GB ? raw hardware ? raw hardware
Main Camera 13 megapixel 8 megapixel Yes 3 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture 1080p HD 1080p HD - ?
Front Camera 2 megapixel 1 megapixel - -
Weight 5.64 oz
(160g)
4.97 oz
(141g)
3 oz
(85g)
4.4 oz
(125g)
Dimensions 5.5" x 2.6" x 0.35"
(140 x 66 x 8.9 mm)
5.16" x 2.6" x 0.4"
(131 x 66 x 10.2 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
Form Factor Slab Slab Clamshell Clamshell
Platform / OS (proprietary) Android (proprietary) (proprietary)
Network Bands

4G LTE: 1, 2, 3, 4, 5, 7, 8, 17

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

4G LTE: 25, 26, 41

CDMA: 800, 850, 1900

GSM: 900, 1800, 1900

CDMA: 850, 1900

Data Technology LTE (Cat 4) LTE (Cat 4) GPRS EVDO r0
Features 
Flashlight Yes - - Yes
GPS / Location Yes n/a - Yes
Accessibility
Adjustable Text Size - n/a - -
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
- Yes
M3 (mostly compatible)
Multiple Languages Yes n/a Yes Yes
TTY/TDD (Digital) Yes Yes - Yes
Alerts
Extra Display - - - Yes
Connectivity
Bluetooth Yes Yes - Yes
Mobile Hotspot Yes n/a - -
NFC Yes - - -
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 Yes n/a Yes Yes
Ringer ID Yes n/a Yes Yes
Voice Dialing Yes n/a - Yes
Customization
Custom Graphics - n/a Yes Yes
Custom Ringtones Yes n/a Yes Yes
Real-Music Ringers - n/a - Yes
Data & Network
Data Tethering Yes n/a - Yes
WAP / Web Browser Yes n/a Yes Yes
Input
Predictive Text Entry Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes
Touch Screen Yes
Capacitive
Yes
Capacitive
- -
Memory
Memory Card Slot - Yes - Yes
Messaging
Email Client Yes n/a - -
EMS / Picture Messaging - n/a Yes Yes
Instant Messaging - n/a - -
MMS Yes n/a Yes Yes
Text Messaging Templates Yes n/a Yes Yes
Music
Headphone Jack (3.5mm) Yes Yes - -
Music Player Yes n/a - Yes
Stereo Speakers Yes - - Yes
Photo & Video
Miracast Yes Yes - -
TV Output Yes - - Yes
Productivity
Alarm Yes n/a Yes Yes
Calculator Yes n/a Yes Yes
Calendar Yes n/a Yes Yes
To-Do List - n/a Yes -
Voice Memo Yes n/a Yes Yes
Software
BREW - n/a - Yes
Games Yes n/a Yes Yes
Java (J2ME) - n/a Yes -
Voice
HD Voice Yes Yes - -
Headset Jack (2.5 mm) - n/a Yes -
Speaker Phone Yes Yes Yes Yes
  Amazon Fire Sharp Aquos Crystal Samsung SGH-X640 Samsung SCH-A990
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Phone Amazon Fire Sharp Aquos Crystal Samsung SGH-X640 Samsung SCH-A990

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