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Phone Samsung SGH-X640 Samsung SGH-A197 Alcatel Pop Astro
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 2" diag.
4 : 3
4.5" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
128 x 160 pixels
(~102 ppi)
LCD (TFT/TFD)
540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz
Battery 800 mAh 800 mAh 2,000 mAh
Processor ? ? 1.5 GHz MediaTek MTK6732
RAM ? ? 1 GB
Storage ? raw hardware ? raw hardware 4 GB
Main Camera Yes Yes 5 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - - 1080p HD
Front Camera - - Yes
Weight 3 oz
(85g)
2.7 oz
(77g)
5.11 oz
(145g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.78" x 1.85" x 0.75"
(96 x 47 x 19.1 mm)
5.23" x 2.57" x 0.39"
(133 x 65 x 9.9 mm)
Form Factor Clamshell Clamshell Slab
Platform / OS (proprietary) (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

GSM: 850, 1900

4G LTE: 2, 4, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

Data Technology GPRS GPRS LTE (Cat 4)
Features 
Flashlight - - Yes
GPS / Location - - n/a
Accessibility
Adjustable Text Size - - n/a
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages Yes Yes n/a
TTY/TDD (Digital) - Yes Yes
Alerts
Extra Display - Yes -
Ringer Profiles - Yes -
Connectivity
Bluetooth - Yes Yes
Mobile Hotspot - - n/a
USB - Yes
Micro-USB
Yes
Micro-USB
Wi-Fi - - Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes Yes n/a
Ringer ID Yes Yes n/a
Voice Dialing - - n/a
Customization
Custom Graphics Yes Yes n/a
Custom Ringtones Yes Yes n/a
Real-Music Ringers - Yes n/a
Data & Network
Data Tethering - - n/a
WAP / Web Browser Yes Yes n/a
Input
Predictive Text Entry Yes Yes n/a
Side Keys Yes Yes Yes
Touch Screen - - Yes
Memory
Memory Card Slot - - Yes
Messaging
Email Client - Yes n/a
EMS / Picture Messaging Yes - n/a
Instant Messaging - Yes n/a
MMS Yes Yes n/a
Text Messaging Templates Yes Yes n/a
Music
FM Radio - - Yes
Headphone Jack (3.5mm) - - Yes
Music Player - - n/a
Productivity
Alarm Yes Yes n/a
Calculator Yes Yes n/a
Calendar Yes Yes n/a
To-Do List Yes - n/a
Voice Memo Yes Yes n/a
Software
Games Yes Yes n/a
Java (J2ME) Yes Yes n/a
Voice
HD Voice - - Yes
Headset Jack (2.5 mm) Yes - n/a
Speaker Phone Yes Yes Yes
  Samsung SGH-X640 Samsung SGH-A197 Alcatel Pop Astro
  X > < X > < X

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Phone Samsung SGH-X640 Samsung SGH-A197 Alcatel Pop Astro

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