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Phone Samsung SGH-X640 Samsung Galaxy J2 / J2 Pure / J2 Dash Sony Ericsson K850 Kyocera 3225
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 5" diag.
16 : 9
2.2" diag.
4 : 3
?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
540 x 960 pixels
(~220 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
?
LCD (Grayscale)
Display Refresh ? 60 Hz ? ?
Battery 800 mAh 2,600 mAh ? ?
Processor ? 1.4 GHz Samsung Exynos 7570 ? ?
RAM ? 2 GB ? ?
Storage ? raw hardware 16 GB ? raw hardware ? raw hardware
Main Camera Yes 8 megapixel 5 megapixel -
Wide Camera - - - -
Tele Camera - - - -
Video Capture - 1080p HD ? -
Front Camera - 5 megapixel - -
Weight 3 oz
(85g)
5.43 oz
(154g)
4.2 oz
(119g)
4.23 oz
(120g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.65" x 2.84" x 0.35"
(144 x 72 x 8.9 mm)
4" x 1.9" x 0.7"
(102 x 48 x 17.8 mm)
3.4" x 1.97" x 1.02"
(86 x 50 x 25.9 mm)
Form Factor Clamshell Slab Slab Slab
Platform / OS (proprietary) Android (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

4G LTE: 2, 3, 4, 5, 7, 12, 14, 66, 71

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

AMPS: 850

Data Technology GPRS LTE (Cat 4) HSDPA 3.6 1xRTT
Features 
Flashlight - Yes - -
GPS / Location - n/a - Yes
Accessibility
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
- -
Multiple Languages Yes n/a Yes Yes
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Ringer Profiles - - Yes -
Connectivity
Bluetooth - Yes Yes -
USB - Yes
Micro-USB
Yes -
Wi-Fi - Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID Yes n/a Yes -
Ringer ID Yes n/a Yes -
Voice Dialing - n/a Yes Yes
Customization
Custom Graphics Yes n/a Yes Yes
Custom Ringtones Yes n/a Yes Yes
Real-Music Ringers - n/a Yes -
Data & Network
Data Tethering - n/a Yes Yes
WAP / Web Browser Yes n/a Yes Yes
Input
Predictive Text Entry Yes n/a Yes Yes
Side Keys Yes Yes Yes -
Touch Screen - Yes
Capacitive
- -
Memory
Memory Card Slot - Yes Yes -
Messaging
Email Client - n/a Yes -
EMS / Picture Messaging Yes n/a - Yes
MMS Yes n/a Yes -
Text Messaging Templates Yes n/a Yes -
Music
FM Radio - - Yes -
Headphone Jack (3.5mm) - Yes - -
Music Player - n/a Yes -
Photo & Video
Video Calling - n/a Yes * -
Productivity
Alarm Yes n/a Yes Yes
Calculator Yes n/a Yes Yes
Calendar Yes n/a Yes Yes
To-Do List Yes n/a Yes -
Voice Memo Yes n/a Yes -
Software
BREW - n/a - Yes
Games Yes n/a Yes Yes
Java (J2ME) Yes n/a Yes -
Voice
Headset Jack (2.5 mm) Yes n/a - Yes
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Samsung Galaxy J2 / J2 Pure / J2 Dash Sony Ericsson K850 Kyocera 3225
  X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung Galaxy J2 / J2 Pure / J2 Dash Sony Ericsson K850 Kyocera 3225

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