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Phone Samsung SGH-X640 Samsung SCH-U620 LG G Flex (U.S. GSM) LG AX-490
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? ? 6" diag.
16 : 9
?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
720 x 1280 pixels
(~245 ppi)
AMOLED
128 x 160 pixels
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz ?
Battery 800 mAh 1,000 mAh 3,500 mAh 1,100 mAh
Processor ? ? 2.3 GHz Qualcomm Snapdragon 800 ?
RAM ? ? 2 GB ?
Storage ? raw hardware ? raw hardware 32 GB ? raw hardware
Main Camera Yes 1 megapixel 13 megapixel Yes
Wide Camera - - - -
Tele Camera - - - -
Video Capture - QVGA (320 x 240) 4K UHD -
Front Camera - - 2 megapixel -
Weight 3 oz
(85g)
3.74 oz
(106g)
6.24 oz
(177g)
3.79 oz
(107g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.78" x 1.85" x 0.87"
(96 x 47 x 22.1 mm)
6.32" x 3.21" x 0.31"
(160 x 82 x 8 mm)
3.74" x 1.92" x 1"
(95 x 49 x 25.4 mm)
Form Factor Clamshell Slide Slab Clamshell
Platform / OS (proprietary) (proprietary) Android (proprietary)
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

4G LTE: 2, 4, 5, 7, 17

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

AMPS: 850

Data Technology GPRS EVDO r0 LTE (Cat 4) 1xRTT
Features 
Flashlight - - Yes -
GPS / Location - Yes n/a Yes
Accessibility
Adjustable Text Size - - n/a -
Hearing Aid Compatible - Yes
M4 (very compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3 (mostly compatible)
Multiple Languages Yes Yes n/a Yes
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Extra Display - - - Yes
Connectivity
Bluetooth - Yes Yes Yes
Infrared (IR) - - Yes -
Mobile Hotspot - - n/a -
NFC - - Yes -
USB - Yes Yes
Micro-USB
Yes
Wi-Fi - - Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID Yes Yes n/a Yes
Ringer ID Yes Yes n/a Yes
Voice Dialing - Yes n/a Yes
Customization
Custom Graphics Yes Yes n/a Yes
Custom Ringtones Yes Yes n/a Yes
Real-Music Ringers - - n/a Yes
Data & Network
Data Tethering - - n/a Yes
WAP / Web Browser Yes Yes n/a Yes
Input
Predictive Text Entry Yes Yes n/a -
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes
Touch Screen - - Yes
Capacitive
-
Memory
Memory Card Slot - Yes - -
Messaging
Email Client - - n/a -
EMS / Picture Messaging Yes - n/a -
Instant Messaging - Yes n/a -
MMS Yes Yes n/a Yes
Text Messaging Templates Yes Yes n/a Yes
Music
Headphone Jack (3.5mm) - - Yes -
Music Player - Yes n/a -
Stereo Speakers - Yes - Yes
Photo & Video
DLNA - - Yes -
Miracast - - Yes -
TV Output - - Yes -
Productivity
Alarm Yes Yes n/a Yes
Calculator Yes Yes n/a Yes
Calendar Yes Yes n/a Yes
To-Do List Yes - n/a -
Voice Memo Yes Yes n/a Yes
Software
BREW - Yes n/a Yes
Games Yes Yes n/a Yes
Java (J2ME) Yes - n/a -
Voice
HD Voice - - Yes * -
Headset Jack (2.5 mm) Yes Yes n/a Yes
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Samsung SCH-U620 LG G Flex (U.S. GSM) LG AX-490
  X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung SCH-U620 LG G Flex (U.S. GSM) LG AX-490

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