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Phone Apple iPhone 4 (CDMA) Samsung SGH-E900 / E906 TCL 20 SE Casio G'zOne Rock Samsung SGH-X640
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 3.5" diag.
5 : 3
? 6.8" diag.
20.5 : 9
2.1" diag.
4 : 3
?
Display Resolution & Type 640 x 960 pixels
(~330 ppi)
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
720 x 1640 pixels
(~263 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~190 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
Display Refresh 60 Hz ? 60 Hz ? ?
Battery ? 800 mAh 5,000 mAh 1,150 mAh 800 mAh
Processor ? ? 1.6 GHz Qualcomm Snapdragon 460 ? ?
RAM ? ? 4 GB ? ?
Storage 8 GB * ? raw hardware 128 GB ? raw hardware ? raw hardware
Main Camera 5 megapixel 2 megapixel 48 megapixel 2 megapixel Yes
Wide Camera - - 5 megapixel - -
Tele Camera - - - - -
Video Capture 720p HD ? 1080p HD ? -
Front Camera Yes - 13 megapixel - -
Weight 4.8 oz
(136g)
3.28 oz
(93g)
7.31 oz
(207g)
4.4 oz
(125g)
3 oz
(85g)
Dimensions 4.5" x 2.31" x 0.37"
(114 x 59 x 9.4 mm)
3.66" x 1.77" x 0.65"
(93 x 45 x 16.5 mm)
6.78" x 3.04" x 0.35"
(172 x 77 x 8.9 mm)
4.1" x 2" x 0.9"
(104 x 51 x 22.9 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
Form Factor Slab Slide Slab Clamshell Clamshell
Platform / OS iOS (proprietary) Android (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

GSM: 900, 1800, 1900

*

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 26, 28, 66

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

GSM: 900, 1800, 1900

Data Technology EVDO rA EDGE LTE (Cat 4) EVDO rA GPRS
Features 
Fingerprint Reader - - Yes
stand-alone
- -
Flashlight - - Yes Yes -
GPS / Location n/a - n/a Yes -
Ruggedized - - - Yes -
Water-Resistant - - - Yes -
Accessibility
Adjustable Text Size n/a - n/a - -
Hearing Aid Compatible Yes - Yes Yes -
Multiple Languages n/a Yes n/a Yes Yes
TTY/TDD (Digital) - - Yes Yes -
Alerts
Extra Display - - - Yes -
Connectivity
Bluetooth Yes Yes Yes Yes -
Mobile Hotspot n/a - n/a - -
USB Yes Yes Yes
USB Type C
Yes -
Wi-Fi Yes
4 (802.11 b,g,n)
- Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID n/a Yes n/a Yes Yes
Ringer ID n/a Yes n/a Yes Yes
Voice Dialing n/a - n/a Yes -
Customization
Custom Graphics n/a Yes n/a Yes Yes
Custom Ringtones n/a Yes n/a Yes Yes
Real-Music Ringers n/a Yes n/a Yes -
Data & Network
Data Tethering n/a - n/a Yes -
WAP / Web Browser n/a Yes n/a Yes Yes
Input
Predictive Text Entry n/a Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Touch Screen Yes - Yes - -
Memory
Memory Card Slot - Yes Yes Yes -
Messaging
Email Client n/a Yes n/a Yes -
EMS / Picture Messaging n/a - n/a - Yes
Instant Messaging n/a - n/a Yes -
MMS n/a Yes n/a Yes Yes
Text Messaging Templates n/a Yes n/a Yes Yes
Music
FM Radio - - Yes - -
Headphone Jack (3.5mm) Yes - Yes - -
Music Player n/a Yes n/a Yes -
Photo & Video
TV Output Yes Yes - - -
Video Calling n/a - n/a - -
Productivity
Alarm n/a Yes n/a Yes Yes
Calculator n/a Yes n/a Yes Yes
Calendar n/a Yes n/a Yes Yes
To-Do List n/a - n/a - Yes
Voice Memo n/a Yes n/a Yes Yes
Software
BREW n/a - n/a Yes -
Games n/a Yes n/a Yes Yes
Java (J2ME) n/a Yes n/a - Yes
Voice
HD Voice - - Yes - -
Headset Jack (2.5 mm) n/a - n/a Yes Yes
Push-To-Talk - - - Yes -
Speaker Phone Yes Yes Yes Yes Yes
  Apple iPhone 4 (CDMA) Samsung SGH-E900 / E906 TCL 20 SE Casio G'zOne Rock Samsung SGH-X640
  X > < X > < X > < X > < X

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

 
Phone Apple iPhone 4 (CDMA) Samsung SGH-E900 / E906 TCL 20 SE Casio G'zOne Rock Samsung SGH-X640

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