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Phone Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo LG K40 / Harmony 3 Samsung SCH-U520 Palm Pre Plus (GSM)
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 5.5" diag.
16 : 9
5.7" diag.
18 : 9
? 3.1" diag.
5 : 3
Display Resolution & Type 720 x 1280 pixels
(~267 ppi)
LCD (TFT/TFD)
720 x 1440 pixels
(~282 ppi)
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
320 x 480 pixels
(~186 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz 60 Hz ? ?
Battery 3,300 mAh 3,000 mAh 800 mAh 1,150 mAh
Processor 1.6 GHz Samsung Exynos 7870 1.8 GHz Qualcomm Snapdragon 450 ? ?
RAM 2 GB 2 GB ? ?
Storage 16 GB * 32 GB ? raw hardware ? raw hardware
Main Camera 8 megapixel 13 megapixel 1 megapixel 3 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture 1080p HD 1080p HD ? VGA (640 x 480)
Front Camera Yes 5 megapixel - -
Weight 5.8 oz
(164g)
5.11 oz
(145g)
2.96 oz
(84g)
4.89 oz
(139g)
Dimensions 5.96" x 3.01" x 0.34"
(151 x 76 x 8.6 mm)
6.02" x 2.83" x 0.32"
(153 x 72 x 8.1 mm)
3.71" x 1.92" x 0.66"
(94 x 49 x 16.8 mm)
3.9" x 2.3" x 0.67"
(99 x 58 x 17 mm)
Form Factor Slab Slab Clamshell Slide
Platform / OS Android Android (proprietary) webOS
Network Bands

4G LTE: 2, 3, 4, 5, 7, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

4G LTE: 2, 4, 5, 12, 13, 14, 25, 26, 29, 30, 41, 66, 71

WCDMA: 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

Data Technology LTE (Cat 6) LTE (Cat 6) EVDO r0 HSDPA 1.8
Features 
Fingerprint Reader - Yes
stand-alone
- -
Flashlight Yes Yes - -
GPS / Location n/a n/a Yes n/a
Accessibility
Hearing Aid Compatible Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4 (very compatible)
-
Multiple Languages n/a n/a Yes n/a
TTY/TDD (Digital) Yes Yes Yes Yes
Alerts
Extra Display - - Yes -
Connectivity
Bluetooth Yes Yes Yes Yes
NFC - Yes * - -
USB Yes
Micro-USB
Yes
Micro-USB
- Yes
Micro-USB
Wi-Fi Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
- Yes
802.11 b,g
Contacts
Picture ID n/a n/a Yes n/a
Ringer ID n/a n/a Yes n/a
Voice Dialing n/a n/a Yes n/a
Customization
Custom Graphics n/a n/a Yes n/a
Custom Ringtones n/a n/a Yes n/a
Real-Music Ringers n/a n/a Yes n/a
Data & Network
Data Tethering n/a n/a Yes n/a
WAP / Web Browser n/a n/a Yes n/a
Input
Predictive Text Entry n/a n/a Yes n/a
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes
Touch Screen Yes
Capacitive
Yes
Capacitive
- Yes
Capacitive
Memory
Memory Card Slot Yes Yes Yes -
Messaging
Email Client n/a n/a - n/a
Instant Messaging n/a n/a - n/a
MMS n/a n/a Yes n/a
Text Messaging Templates n/a n/a Yes n/a
Music
FM Radio Yes Yes - -
Headphone Jack (3.5mm) Yes Yes - Yes
Music Player n/a n/a Yes n/a
Stereo Speakers - - Yes -
Photo & Video
DLNA - Yes - -
Productivity
Alarm n/a n/a Yes n/a
Calculator n/a n/a Yes n/a
Calendar n/a n/a Yes n/a
To-Do List n/a n/a - n/a
Voice Memo n/a n/a Yes n/a
Software
BREW n/a n/a Yes n/a
Games n/a n/a Yes n/a
Voice
HD Voice Yes Yes - -
Headset Jack (2.5 mm) n/a n/a Yes n/a
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo LG K40 / Harmony 3 Samsung SCH-U520 Palm Pre Plus (GSM)
  X > < X > < X > < X

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

 
Phone Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo LG K40 / Harmony 3 Samsung SCH-U520 Palm Pre Plus (GSM)

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