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Phone Samsung Gleam SCH-U700 / Muse Samsung SGH-X640 Samsung Messager R450 AT&T Vista
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.1" diag.
4 : 3
? 2.1" diag.
4 : 3
5.5" diag.
18 : 9
Display Resolution & Type 240 x 320 pixels
(~190 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
176 x 220 pixels
(~134 ppi)
LCD (TFT/TFD)
720 x 1440 pixels
(~293 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ? 60 Hz
Battery 800 mAh 800 mAh 960 mAh 2,450 mAh
Processor ? ? ? 2 GHz MediaTek Helio A22 (MT6761V)
RAM ? ? ? 3 GB
Storage ? raw hardware ? raw hardware ? raw hardware 32 GB
Main Camera 2 megapixel Yes 1 megapixel 8 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture ? - - 1080p HD
Front Camera - - - 5 megapixel
Weight 3.35 oz
(95g)
3 oz
(85g)
4.58 oz
(130g)
5.51 oz
(156g)
Dimensions 3.88" x 1.91" x 0.55"
(99 x 49 x 14 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.4" x 2" x 0.7"
(112 x 51 x 17.8 mm)
5.88" x 2.82" x 0.35"
(149 x 72 x 8.9 mm)
Form Factor Clamshell Clamshell Slab Slab
Platform / OS (proprietary) (proprietary) (proprietary) Android
Network Bands

CDMA: 850, 1900

GSM: 900, 1800, 1900

CDMA: 850, 1700, 1900

4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30

WCDMA: 1, 2, 4, 5, 8

Data Technology EVDO r0 GPRS 1xRTT LTE (Cat 4)
Features 
Flashlight - - - Yes
GPS / Location Yes - Yes n/a
Accessibility
Hearing Aid Compatible Yes
M4 (very compatible)
- Yes
M3 (mostly compatible)
Yes
M4, T4 (very tele-coil compatible)
Multiple Languages Yes Yes Yes n/a
TTY/TDD (Digital) Yes - Yes -
Alerts
Extra Display Yes - - -
Connectivity
Bluetooth Yes - Yes Yes
USB - - Yes Yes
USB Type C
Wi-Fi - - - Yes
Contacts
Picture ID Yes Yes Yes n/a
Ringer ID - Yes Yes n/a
Voice Dialing Yes - Yes n/a
Customization
Custom Graphics Yes Yes Yes n/a
Custom Ringtones Yes Yes Yes n/a
Data & Network
Data Tethering Yes - - n/a
WAP / Web Browser Yes Yes Yes n/a
Input
Predictive Text Entry Yes Yes Yes n/a
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - Yes -
Touch Screen - - - Yes
Capacitive
Memory
Memory Card Slot Yes - Yes Yes
Messaging
EMS / Picture Messaging Yes Yes - n/a
Instant Messaging Yes - - n/a
MMS Yes Yes Yes n/a
Text Messaging Templates - Yes Yes n/a
Music
Headphone Jack (3.5mm) - - - Yes
Music Player Yes - Yes n/a
Stereo Speakers Yes - - -
Productivity
Alarm Yes Yes Yes n/a
Calculator Yes Yes Yes n/a
Calendar Yes Yes Yes n/a
To-Do List - Yes - n/a
Voice Memo Yes Yes Yes n/a
Software
BREW Yes - Yes n/a
Games Yes Yes Yes n/a
Java (J2ME) - Yes - n/a
Voice
HD Voice - - - Yes
Headset Jack (2.5 mm) Yes Yes - n/a
Speaker Phone Yes Yes Yes Yes
  Samsung Gleam SCH-U700 / Muse Samsung SGH-X640 Samsung Messager R450 AT&T Vista
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Phone Samsung Gleam SCH-U700 / Muse Samsung SGH-X640 Samsung Messager R450 AT&T Vista

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