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Phone Samsung SGH-X640 Alcatel Pop Astro TCL 40 XL / Jitterbug Smart 4 Samsung SCH-U430 Sharp Sidekick LX 2007
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 4.5" diag.
16 : 9
6.8" diag.
20 : 9
? 3" diag.
5 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~260 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
400 x 240 pixels
(~155 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 90 Hz ? ?
Battery 800 mAh 2,000 mAh 5,000 mAh 1,000 mAh 1,540 mAh
Processor ? 1.5 GHz MediaTek MTK6732 2.3 GHz MediaTek Helio G37 ? 200 MHz OMAP 331
RAM ? 1 GB 4 GB ? ?
Storage ? raw hardware 4 GB 128 GB ? raw hardware ? raw hardware
Main Camera Yes 5 megapixel 50 megapixel Yes 1 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - 1080p HD 1080p HD - ?
Front Camera - Yes 8 megapixel - -
Weight 3 oz
(85g)
5.11 oz
(145g)
6.88 oz
(195g)
3.21 oz
(91g)
5.7 oz
(162g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.23" x 2.57" x 0.39"
(133 x 65 x 9.9 mm)
6.61" x 3.01" x 0.35"
(168 x 76 x 8.8 mm)
3.67" x 1.85" x 0.78"
(93 x 47 x 19.8 mm)
5.12" x 2.36" x 0.7"
(130 x 60 x 17.9 mm)
Form Factor Clamshell Slab Slab Clamshell Swivel
Platform / OS (proprietary) Android Android (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

4G LTE: 2, 4, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

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

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

Data Technology GPRS LTE (Cat 4) LTE (Cat 6) 1xRTT EDGE
Features 
Barometer - - Yes - -
Fingerprint Reader - - Yes - -
Flashlight - Yes Yes - Yes
GPS / Location - n/a n/a Yes -
Accessibility
Adjustable Text Size - n/a n/a Yes Yes
Hearing Aid Compatible - Yes Yes Yes Yes
Multiple Languages Yes n/a n/a Yes -
TTY/TDD (Digital) - Yes Yes Yes -
Alerts
Extra Display - - - Yes -
Ringer Profiles - - - - Yes
Connectivity
Bluetooth -
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Mobile Hotspot - n/a n/a - -
USB - Yes
Micro-USB
Yes
USB Type C
- Yes
Wi-Fi - Yes
4 (802.11 b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
- -
Contacts
Picture ID Yes n/a n/a Yes Yes
Ringer ID Yes n/a n/a Yes Yes
Voice Dialing - n/a n/a Yes -
Customization
Custom Graphics Yes n/a n/a Yes Yes
Custom Ringtones Yes n/a n/a Yes Yes
Real-Music Ringers - n/a n/a - Yes
Data & Network
Data Tethering - n/a n/a - -
WAP / Web Browser Yes n/a n/a Yes Yes
Input
Predictive Text Entry Yes n/a n/a Yes -
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - - - Yes
Touch Screen - Yes Yes - -
Memory
Memory Card Slot - Yes Yes - Yes
Messaging
Email Client - n/a n/a Yes Yes
EMS / Picture Messaging Yes n/a n/a Yes -
Instant Messaging - n/a n/a Yes Yes
MMS Yes n/a n/a Yes Yes
Text Messaging Templates Yes n/a n/a Yes Yes
Music
FM Radio - Yes - - -
Headphone Jack (3.5mm) - Yes Yes - Yes
Music Player - n/a n/a - Yes
Stereo Speakers - - Yes - -
Power
Fast Charging - - Yes - -
Productivity
Alarm Yes n/a n/a Yes Yes *
Calculator Yes n/a n/a Yes -
Calendar Yes n/a n/a Yes Yes
To-Do List Yes n/a n/a - Yes
Voice Memo Yes n/a n/a Yes -
Software
BREW - n/a n/a Yes -
Games Yes n/a n/a Yes Yes
Java (J2ME) Yes n/a n/a - Yes
Voice
HD Voice - Yes Yes - -
Headset Jack (2.5 mm) Yes n/a n/a Yes -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Alcatel Pop Astro TCL 40 XL / Jitterbug Smart 4 Samsung SCH-U430 Sharp Sidekick LX 2007
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SGH-X640 Alcatel Pop Astro TCL 40 XL / Jitterbug Smart 4 Samsung SCH-U430 Sharp Sidekick LX 2007

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