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Phone ZTE Z331 Samsung Captivate Glide Samsung Galaxy S II, Epic 4G Touch Red Hydrogen One Sharp Sidekick LX 2009
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
4" diag.
5 : 3
4.5" diag.
5 : 3
5.7" diag.
16 : 9
3.2" diag.
16 : 9
Display Resolution & Type 176 x 220 pixels
(~117 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
AMOLED
480 x 800 pixels
(~206 ppi)
AMOLED
1440 x 2560 pixels
(~515 ppi)
LCD (TFT/TFD)
854 x 480 pixels
(~306 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz 60 Hz ?
Battery 950 mAh 1,650 mAh 1,800 mAh 4,510 mAh 1,250 mAh
Processor ? 1 GHz Nvidia Tegra 2 AP20H 1.2 GHz Samsung Exynos C210 dual-core 2.5 GHz Qualcomm Snapdragon 835 (MSM8998) ?
RAM ? 1 GB ? 6 GB ?
Storage ? raw hardware 8 GB 16 GB 128 GB * ? raw hardware
Main Camera 3 megapixel 8 megapixel 8 megapixel 12 megapixel 3 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture QCIF (176 x 144) 720p HD 1080p HD 4K UHD QVGA (320 x 240)
Front Camera - 1 megapixel 2 megapixel 8 megapixel -
Weight 4 oz
(113g)
5.2 oz
(147g)
4.55 oz
(129g)
9.63 oz
(273g)
5.78 oz
(164g)
Dimensions 3.84" x 2.02" x 0.69"
(98 x 51 x 17.5 mm)
4.88" x 2.55" x 0.51"
(124 x 65 x 13 mm)
5.1" x 2.7" x 0.38"
(130 x 69 x 9.6 mm)
6.54" x 3.28" x 0.39"
(166 x 83 x 10 mm)
5.12" x 2.36" x 0.63"
(130 x 60 x 16 mm)
Form Factor Clamshell Slide Slab Slab Swivel
Platform / OS (proprietary) Android Android Android (proprietary)
Network Bands

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

4G WiMAX: 41

CDMA: 800, 850, 1900

*

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8, 19

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

WCDMA: 1, 4

GSM: 850, 900, 1800, 1900

Data Technology HSDPA 3.6 HSPA+ 21 WiMAX LTE (Cat 12) HSPA 7.2
Features 
Fingerprint Reader - - - Yes
stand-alone
-
Flashlight - - - Yes -
GPS / Location Yes n/a n/a n/a Yes
Accessibility
Adjustable Text Size - n/a n/a n/a Yes
Hearing Aid Compatible Yes Yes Yes Yes Yes
Multiple Languages Yes n/a n/a n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes -
Alerts
Extra Display Yes - - - -
Ringer Profiles Yes - - - Yes
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Mobile Hotspot - n/a n/a n/a -
NFC - - - Yes -
USB Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Yes
USB Type C
Yes
Wi-Fi - Yes Yes
4 (802.11 a,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID Yes n/a n/a n/a Yes
Ringer ID Yes n/a n/a n/a Yes
Voice Dialing - n/a n/a n/a -
Customization
Custom Graphics Yes n/a n/a n/a Yes
Custom Ringtones Yes n/a n/a n/a Yes
Real-Music Ringers Yes n/a n/a n/a Yes
Data & Network
Data Tethering Yes n/a n/a n/a -
WAP / Web Browser Yes n/a n/a n/a Yes
Input
Predictive Text Entry Yes n/a n/a n/a -
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - Yes - - Yes
Touch Screen - Yes Yes Yes -
Memory
Memory Card Slot Yes Yes Yes Yes Yes
Messaging
Email Client Yes n/a n/a n/a Yes
Instant Messaging Yes n/a n/a n/a Yes
MMS Yes n/a n/a n/a Yes
Text Messaging Templates Yes n/a n/a n/a Yes
Music
FM Radio - - - Yes -
Headphone Jack (3.5mm) - Yes Yes Yes Yes
Music Player Yes n/a n/a n/a Yes
Stereo Speakers - - - Yes -
Photo & Video
DLNA - Yes Yes - -
TV Output - Yes Yes - -
Power
Fast Charging - - - Yes -
Productivity
Alarm Yes n/a n/a n/a Yes
Calculator Yes n/a n/a n/a -
Calendar Yes n/a n/a n/a Yes
To-Do List - n/a n/a n/a Yes
Voice Memo Yes n/a n/a n/a -
Software
Games Yes n/a n/a n/a Yes
Java (J2ME) Yes n/a n/a n/a Yes
Voice
HD Voice - - - Yes -
Speaker Phone Yes Yes Yes Yes Yes
  ZTE Z331 Samsung Captivate Glide Samsung Galaxy S II, Epic 4G Touch Red Hydrogen One Sharp Sidekick LX 2009
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone ZTE Z331 Samsung Captivate Glide Samsung Galaxy S II, Epic 4G Touch Red Hydrogen One Sharp Sidekick LX 2009

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