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Phone Samsung SGH-X640 ZTE Z221 LG G Flex2 (GSM) Samsung Glyde U940
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 2" diag.
4 : 3
5.5" diag.
16 : 9
2.8" diag.
16.5 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
1080 x 1920 pixels
(~401 ppi)
AMOLED
240 x 440 pixels
(~182 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz ?
Battery 800 mAh 900 mAh 3,000 mAh 1,000 mAh
Processor ? ? Qualcomm Snapdragon 810 ?
RAM ? ? 3 GB * ?
Storage ? raw hardware 142 MB 32 GB * ? raw hardware
Main Camera Yes Yes 13 megapixel 2 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture - QCIF (176 x 144) 4K UHD QVGA (320 x 240)
Front Camera - - 2 megapixel -
Weight 3 oz
(85g)
3.24 oz
(92g)
5.36 oz
(152g)
4.2 oz
(119g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
5.87" x 2.96" x 0.35"
(149 x 75 x 8.9 mm)
4.09" x 1.98" x 0.71"
(104 x 50 x 18 mm)
Form Factor Clamshell Clamshell Slab Slide
Platform / OS (proprietary) (proprietary) Android (proprietary)
Network Bands

GSM: 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 12, 17, 29

WCDMA: 1, 2, 5, 8

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

Data Technology GPRS HSDPA 3.6 LTE (Cat 4) EVDO r0
Features 
GPS / Location - Yes n/a Yes
Accessibility
Adjustable Text Size - - n/a -
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T4 (very tele-coil compatible)
Yes
M4 (very compatible)
Multiple Languages Yes Yes n/a Yes
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Extra Display - Yes - -
Ringer Profiles - 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 - n/a Yes
Ringer ID Yes - n/a Yes
Voice Dialing - - n/a Yes
Customization
Custom Graphics Yes Yes n/a Yes
Custom Ringtones Yes Yes n/a Yes
Real-Music Ringers - Yes 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 Yes
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes
Touch Screen - - Yes
Capacitive
Yes
Memory
Memory Card Slot - - Yes Yes
Messaging
Email Client - Yes 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 - - n/a Yes
Photo & Video
DLNA - - Yes -
Miracast - - Yes -
TV Output - - Yes -
Power
Fast Charging - - 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 -
Software
BREW - - n/a Yes
Games Yes Yes n/a Yes
Java (J2ME) Yes Yes n/a -
Voice
HD Voice - - Yes -
Headset Jack (2.5 mm) Yes - n/a Yes
Speaker Phone Yes Yes Yes Yes
  Samsung SGH-X640 ZTE Z221 LG G Flex2 (GSM) Samsung Glyde U940
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Phone Samsung SGH-X640 ZTE Z221 LG G Flex2 (GSM) Samsung Glyde U940

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