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Phone Samsung SCH-A990 ZTE Speed Samsung SGH-X640
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 4.5" diag.
16 : 9
?
Display Resolution & Type 240 x 320 pixels
LCD (TFT/TFD)
540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
Display Refresh ? 60 Hz ?
Battery 1,000 mAh 2,000 mAh 800 mAh
Processor ? 1.2 GHz Qualcomm Snapdragon 410 MSM8916 ?
RAM ? 1 GB ?
Storage ? raw hardware 8 GB ? raw hardware
Main Camera 3 megapixel 5 megapixel Yes
Wide Camera - - -
Tele Camera - - -
Video Capture ? 720p HD -
Front Camera - 2 megapixel -
Weight 4.4 oz
(125g)
4.8 oz
(136g)
3 oz
(85g)
Dimensions 3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
5.3" x 2.6" x 0.4"
(135 x 66 x 10.2 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
Form Factor Clamshell Slab Clamshell
Platform / OS (proprietary) Android (proprietary)
Network Bands

CDMA: 850, 1900

4G LTE: 25, 26, 41

CDMA: 800, 850, 1900

GSM: 900, 1800, 1900

Data Technology EVDO r0 LTE (Cat 3) GPRS
Features 
Flashlight Yes - -
GPS / Location Yes n/a -
Accessibility
Adjustable Text Size - n/a -
Hearing Aid Compatible Yes
M3 (mostly compatible)
Yes
M3, T4 (very tele-coil compatible)
-
Multiple Languages Yes n/a Yes
TTY/TDD (Digital) Yes Yes -
Alerts
Extra Display Yes - -
Connectivity
Bluetooth Yes Yes -
Mobile Hotspot - n/a -
USB Yes Yes
Micro-USB
-
Wi-Fi - Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID Yes n/a Yes
Ringer ID Yes n/a Yes
Voice Dialing Yes n/a -
Customization
Custom Graphics Yes n/a Yes
Custom Ringtones Yes n/a Yes
Real-Music Ringers Yes n/a -
Data & Network
Data Tethering Yes n/a -
WAP / Web Browser Yes n/a Yes
Input
Predictive Text Entry Yes n/a Yes
Side Keys Yes Yes Yes
Touch Screen - Yes
Capacitive
-
Memory
Memory Card Slot Yes Yes -
Messaging
Email Client - n/a -
EMS / Picture Messaging Yes n/a Yes
Instant Messaging - n/a -
MMS Yes n/a Yes
Text Messaging Templates Yes n/a Yes
Music
Headphone Jack (3.5mm) - Yes -
Music Player Yes n/a -
Stereo Speakers Yes - -
Photo & Video
TV Output Yes - -
Productivity
Alarm Yes n/a Yes
Calculator Yes n/a Yes
Calendar Yes n/a Yes
To-Do List - n/a Yes
Voice Memo Yes n/a Yes
Software
BREW Yes n/a -
Games Yes n/a Yes
Java (J2ME) - n/a Yes
Voice
HD Voice - Yes -
Headset Jack (2.5 mm) - n/a Yes
Speaker Phone Yes Yes Yes
  Samsung SCH-A990 ZTE Speed Samsung SGH-X640
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Phone Samsung SCH-A990 ZTE Speed Samsung SGH-X640

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