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Phone Samsung SGH-X640 Motorola T720 / T721 (GSM) Samsung Galaxy J2 / J2 Pure / J2 Dash Sanyo MM-5600 Cricket Influence / AT&T Maestro Plus
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? ? 5" diag.
16 : 9
? 6.2" diag.
19 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
120 x 160 pixels
LCD (STN)
540 x 960 pixels
(~220 ppi)
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
720 x 1520 pixels
(~271 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz ? 60 Hz
Battery 800 mAh ? 2,600 mAh 1,000 mAh 3,300 mAh
Processor ? ? 1.4 GHz Samsung Exynos 7570 ? 1.8 GHz Qualcomm Snapdragon 460
RAM ? ? 2 GB ? 3 GB
Storage ? raw hardware ? raw hardware 16 GB ? raw hardware 32 GB
Main Camera Yes - 8 megapixel 1 megapixel 13 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - - 1080p HD ? 1080p HD
Front Camera - - 5 megapixel - 5 megapixel
Weight 3 oz
(85g)
3.56 oz
(101g)
5.43 oz
(154g)
4.52 oz
(128g)
6.52 oz
(185g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.5" x 1.87" x 0.83"
(89 x 47 x 21.1 mm)
5.65" x 2.84" x 0.35"
(144 x 72 x 8.9 mm)
3.66" x 1.91" x 1.04"
(93 x 49 x 26.4 mm)
6.28" x 2.99" x 0.35"
(160 x 76 x 8.9 mm)
Form Factor Clamshell Clamshell Slab Clamshell Slab
Platform / OS (proprietary) (proprietary) Android (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

GSM: 850, 1900

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

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

AMPS: 850

4G LTE: 2, 4, 5, 12, 14, 30

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

Data Technology GPRS GPRS LTE (Cat 4) 1xRTT LTE (Cat 13)
Features 
Fingerprint Reader - - - - Yes
stand-alone
Flashlight - - Yes Yes Yes
GPS / Location - - n/a Yes n/a
Accessibility
Hearing Aid Compatible - - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4 (very compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages Yes Yes n/a Yes n/a
TTY/TDD (Digital) - - Yes Yes Yes
Alerts
Extra Display - Yes - Yes -
Connectivity
Bluetooth - - Yes - Yes
USB - - Yes
Micro-USB
Yes Yes
USB Type C
Wi-Fi - - Yes
4 (802.11 b,g,n)
- Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes - n/a Yes n/a
Ringer ID Yes Yes n/a Yes n/a
Voice Dialing - Yes n/a Yes n/a
Customization
Changeable Body Plates - Yes - - -
Custom Graphics Yes Yes n/a Yes n/a
Custom Ringtones Yes Yes n/a Yes n/a
Real-Music Ringers - - n/a Yes n/a
Data & Network
Data Tethering - Yes n/a - n/a
WAP / Web Browser Yes Yes n/a Yes n/a
Input
Predictive Text Entry Yes Yes n/a Yes n/a
Side Keys Yes Yes Yes Yes Yes
Touch Screen - - Yes
Capacitive
- Yes
Capacitive
Memory
Memory Card Slot - - Yes Yes Yes
Messaging
Email Client - Yes n/a - n/a
EMS / Picture Messaging Yes Yes n/a - n/a
MMS Yes - n/a - n/a
Text Messaging Templates Yes Yes n/a - n/a
Music
Headphone Jack (3.5mm) - - Yes - Yes
Music Player - - n/a Yes n/a
Productivity
Alarm Yes Yes n/a Yes n/a
Calculator Yes Yes n/a Yes n/a
Calendar Yes Yes n/a Yes n/a
To-Do List Yes - n/a Yes n/a
Voice Memo Yes Yes n/a Yes n/a
Software
Games Yes Yes n/a Yes n/a
Java (J2ME) Yes Yes n/a Yes n/a
Voice
Call Screening - - - Yes -
HD Voice - - - - Yes
Headset Jack (2.5 mm) Yes Yes n/a Yes n/a
Push-To-Talk - - - Yes -
Speaker Phone Yes - Yes Yes Yes
  Samsung SGH-X640 Motorola T720 / T721 (GSM) Samsung Galaxy J2 / J2 Pure / J2 Dash Sanyo MM-5600 Cricket Influence / AT&T Maestro Plus
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SGH-X640 Motorola T720 / T721 (GSM) Samsung Galaxy J2 / J2 Pure / J2 Dash Sanyo MM-5600 Cricket Influence / AT&T Maestro Plus

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