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Phone Samsung SCH-A990 Samsung SGH-ZX20
Current U.S. Carriers (none) (none)
Global Availability Released Released
Specifications 
Display Size ? ?
Display Resolution & Type 240 x 320 pixels
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
Display Refresh ? ?
Battery 1,000 mAh ?
Processor ? ?
RAM ? ?
Storage ? raw hardware ? raw hardware
Main Camera 3 megapixel 1 megapixel
Wide Camera - -
Tele Camera - -
Video Capture ? QCIF (176 x 144)
Front Camera - -
Weight 4.4 oz
(125g)
3.95 oz
(112g)
Dimensions 3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
3.46" x 1.89" x 1.02"
(88 x 48 x 25.9 mm)
Form Factor Clamshell Clamshell
Platform / OS (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

Data Technology EVDO r0 HSDPA 1.8
Features 
Flashlight Yes -
GPS / Location Yes -
Accessibility
Hearing Aid Compatible Yes
M3 (mostly compatible)
Yes
M3 (mostly compatible)
Multiple Languages Yes Yes
TTY/TDD (Digital) Yes Yes
Alerts
Extra Display Yes Yes
Ringer Profiles - Yes
Connectivity
Bluetooth Yes Yes
USB Yes Yes
Contacts
Picture ID Yes Yes
Ringer ID Yes Yes
Voice Dialing Yes -
Customization
Custom Graphics Yes Yes
Custom Ringtones Yes Yes
Real-Music Ringers Yes Yes
Data & Network
Data Tethering Yes Yes
WAP / Web Browser Yes Yes
Input
Predictive Text Entry Yes Yes
Side Keys Yes Yes
Memory
Memory Card Slot Yes Yes
Messaging
Email Client - Yes
EMS / Picture Messaging Yes -
Instant Messaging - Yes
MMS Yes Yes
Text Messaging Templates Yes Yes
Music
Music Player Yes Yes
Stereo Speakers Yes -
Photo & Video
TV Output Yes -
Productivity
Alarm Yes Yes
Calculator Yes Yes
Calendar Yes Yes
To-Do List - Yes
Voice Memo Yes Yes
Software
BREW Yes -
Games Yes Yes
Java (J2ME) - Yes
Voice
Speaker Phone Yes Yes
  Samsung SCH-A990 Samsung SGH-ZX20
  X > < X

NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SCH-A990 Samsung SGH-ZX20

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