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Phone Samsung SGH-X640 Palm Treo 680 T-Mobile REVVL 4
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? ? 6.2" diag.
19 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
320 x 320 pixels
LCD (TFT/TFD)
720 x 1520 pixels
(~270 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz
Battery 800 mAh ? 3,500 mAh
Processor ? ? 2 GHz MediaTek Helio A22 (MT6761)
RAM ? ? 2 GB
Storage ? raw hardware ? raw hardware 32 GB
Main Camera Yes Yes 13 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - CIF (352 x 288) 1080p HD
Front Camera - - 5 megapixel
Weight 3 oz
(85g)
5.5 oz
(156g)
5.59 oz
(158g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.4" x 2.3" x 0.8"
(112 x 58 x 20.3 mm)
6.26" x 2.99" x 0.32"
(159 x 76 x 8.1 mm)
Form Factor Clamshell Slab Slab
Platform / OS (proprietary) Palm OS Android
Network Bands

GSM: 900, 1800, 1900

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 7, 12, 25, 26, 41, 66, 71

WCDMA: 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

Data Technology GPRS EDGE LTE (Cat 6)
Features 
Fingerprint Reader - - Yes
stand-alone
Flashlight - - Yes
Accessibility
Hearing Aid Compatible - - Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a n/a
TTY/TDD (Digital) - Yes Yes
Connectivity
Bluetooth - Yes Yes
Infrared (IR) - Yes -
USB - Yes Yes
USB Type C
Wi-Fi - - Yes
5 (802.11 a,ac,b,g,n)
Contacts
Picture ID Yes n/a n/a
Ringer ID Yes n/a n/a
Customization
Custom Graphics Yes n/a n/a
Custom Ringtones Yes n/a n/a
Real-Music Ringers - n/a n/a
Data & Network
Data Tethering - n/a n/a
External Antenna Jack - n/a n/a
WAP / Web Browser Yes n/a n/a
Input
Predictive Text Entry Yes n/a n/a
Side Keys Yes Yes Yes
Text Keyboard, Hardware - Yes -
Touch Screen - Yes Yes
Capacitive
Memory
Memory Card Slot - Yes Yes
Messaging
Email Client - n/a n/a
EMS / Picture Messaging Yes n/a n/a
MMS Yes n/a n/a
Text Messaging Templates Yes n/a n/a
Music
FM Radio - - Yes
Headphone Jack (3.5mm) - - Yes
Music Player - n/a n/a
Productivity
Alarm Yes n/a n/a
Calculator Yes n/a n/a
Calendar Yes n/a n/a
To-Do List Yes n/a n/a
Voice Memo Yes n/a n/a
Software
Games Yes n/a n/a
Java (J2ME) Yes n/a n/a
Voice
HD Voice - - Yes
Headset Jack (2.5 mm) Yes n/a n/a
Speaker Phone Yes Yes Yes
  Samsung SGH-X640 Palm Treo 680 T-Mobile REVVL 4
  X > < X > < X

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Phone Samsung SGH-X640 Palm Treo 680 T-Mobile REVVL 4

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