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Phone Samsung SGH-E640 Samsung SGH-N625 LG K4 / Optimus Zone 3 / Rebel LG AX-490 Sonim XP5s
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? ? 4.5" diag.
16 : 9
? 2.6" diag.
4 : 3
Display Resolution & Type 176 x 220 pixels
LCD (TFT/TFD)
128 x 64 pixels 480 x 854 pixels
(~218 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
320 x 432 pixels
(~204 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz ? ?
Battery 800 mAh ? 1,940 mAh 1,100 mAh 3,180 mAh
Processor ? ? 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) ? 1.4 GHz Qualcomm Snapdragon 427 (MSM8920)
RAM ? ? 1.5 GB ? 2 GB
Storage ? raw hardware ? raw hardware 16 GB * ? raw hardware 16 GB
Main Camera 1 megapixel - 5 megapixel Yes 5 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture QCIF (176 x 144) - 720p HD - 720p HD
Front Camera - - 2 megapixel - -
Weight 3.17 oz
(90g)
2.93 oz
(83g)
3.99 oz
(113g)
3.79 oz
(107g)
9.17 oz
(260g)
Dimensions 3.37" x 1.78" x 0.93"
(86 x 45 x 23.6 mm)
3.94" x 1.69" x 0.78"
(100 x 43 x 19.8 mm)
5.19" x 2.62" x 0.35"
(132 x 67 x 8.9 mm)
3.74" x 1.92" x 1"
(95 x 49 x 25.4 mm)
5.55" x 2.52" x 0.91"
(141 x 64 x 23 mm)
Form Factor Clamshell Slab Slab Clamshell Slab
Platform / OS (proprietary) (proprietary) Android (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

GSM: 900, 1900

4G LTE: 2, 4, 5, 13

WCDMA: 1, 2, 5

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

AMPS: 850

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 25, 26, 28, 30, 38, 41, 66

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

Data Technology GPRS - LTE (Cat 3) 1xRTT LTE (Cat 4)
Features 
Barometer - - - - Yes
Flashlight - - Yes - Yes
GPS / Location - - n/a Yes Yes
Ruggedized - - - - Yes
Water-Resistant - - - - Yes
IPX8 (SCUBA)
Accessibility
Adjustable Text Size - - n/a - Yes
Hearing Aid Compatible - - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3 (mostly compatible)
Yes
M3, T4 (very tele-coil compatible)
Multiple Languages Yes Yes n/a Yes Yes
TTY/TDD (Digital) - - Yes Yes Yes
Alerts
Extra Display Yes - - Yes -
Ringer Profiles - - - - Yes
Connectivity
Bluetooth Yes - Yes Yes Yes
Mobile Hotspot - - n/a - Yes
USB Yes - Yes
Micro-USB
Yes Yes
USB Type C
Wi-Fi - - Yes
4 (802.11 b,g,n)
- Yes
5 (802.11 a,ac,b,g,n)
Contacts
Picture ID Yes - n/a Yes Yes
Ringer ID Yes Yes n/a Yes Yes
Voice Dialing - Yes n/a Yes -
Customization
Custom Graphics Yes Yes n/a Yes -
Custom Ringtones Yes Yes n/a Yes Yes
Real-Music Ringers Yes - n/a Yes -
Data & Network
Data Tethering - - n/a Yes -
Dual-SIM - - - - Yes
WAP / Web Browser Yes Yes n/a Yes Yes
Input
Predictive Text Entry Yes Yes n/a - Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes -
Touch Screen - - Yes
Capacitive
- -
Memory
Memory Card Slot - - Yes - Yes
Messaging
Email Client Yes - n/a - -
EMS / Picture Messaging Yes - n/a - -
Instant Messaging - - n/a - -
MMS Yes Yes n/a Yes Yes
Text Messaging Templates Yes Yes n/a Yes Yes
Music
FM Radio - - - - Yes
Headphone Jack (3.5mm) - - Yes - -
Music Player Yes - n/a - Yes
Stereo Speakers - - - Yes -
Photo & Video
Miracast - - Yes - -
Productivity
Alarm Yes Yes n/a Yes Yes
Calculator Yes Yes n/a Yes Yes
Calendar Yes Yes n/a Yes Yes
To-Do List Yes Yes n/a - -
Voice Memo Yes Yes n/a Yes Yes
Software
BREW - - n/a Yes -
Games Yes Yes n/a Yes -
Java (J2ME) Yes - n/a - -
Voice
HD Voice - - Yes * - Yes
Headset Jack (2.5 mm) - Yes n/a Yes -
Push-To-Talk - - - - Yes
Speaker Phone Yes - Yes Yes Yes
  * Some versions only
  Samsung SGH-E640 Samsung SGH-N625 LG K4 / Optimus Zone 3 / Rebel LG AX-490 Sonim XP5s
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-E640 Samsung SGH-N625 LG K4 / Optimus Zone 3 / Rebel LG AX-490 Sonim XP5s

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