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Phone Samsung SGH-E400 Samsung SPH-i550 ZTE Z998 / Unico LTE HTC EVO 4G
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Not yet released Not yet released Released Released
Specifications 
Display Size ? ? 4.5" diag.
16 : 9
4.3" diag.
5 : 3
Display Resolution & Type 128 x 144 pixels
LCD (TFT/TFD)
320 x 320 pixels
LCD (TFT/TFD)
540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~217 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz 60 Hz
Battery 700 mAh ? 2,070 mAh 1,500 mAh
Processor ? 200 MHz Motorola MX-1 1.2 GHz Qualcomm Snapdragon 400 MSM8930 1 GHz Qualcomm Snapdragon S1 QSD8650
RAM ? ? 1 GB ?
Storage ? raw hardware ? raw hardware 4 GB ? raw hardware
Main Camera - 1 megapixel 5 megapixel 8 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture - ? 720p HD 720p HD
Front Camera - - 1 megapixel Yes
Weight 3.1 oz
(88g)
? 4.8 oz
(136g)
6 oz
(170g)
Dimensions 3.46" x 1.65" x 0.89"
(88 x 42 x 22.6 mm)
3.46" x 2.34" x 1.1"
(88 x 59 x 27.9 mm)
5.2" x 2.6" x 0.4"
(132 x 66 x 10.2 mm)
4.8" x 2.6" x 0.5"
(122 x 66 x 12.7 mm)
Form Factor Clamshell Clamshell Slab Slab
Platform / OS (proprietary) Palm OS Android Android
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

AMPS: 850

4G LTE: 2, 4, 5, 17

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

4G WiMAX: 41

CDMA: 850, 1900

Data Technology GPRS 1xRTT LTE (Cat 3) WiMAX
Features 
GPS / Location - n/a n/a n/a
Accessibility
Adjustable Text Size - n/a n/a n/a
Hearing Aid Compatible - - Yes
M3, T4 (very tele-coil compatible)
Yes
Multiple Languages Yes n/a n/a n/a
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Extra Display Yes Yes - -
Connectivity
Bluetooth - - Yes Yes
Infrared (IR) Yes Yes - -
Mobile Hotspot - n/a n/a n/a
USB - - Yes
Micro-USB
Yes
Wi-Fi - - Yes
4 (802.11 b,g,n)
Yes
802.11 b,g
Contacts
Picture ID - n/a n/a n/a
Ringer ID - n/a n/a n/a
Voice Dialing - n/a n/a n/a
Customization
Custom Graphics Yes n/a n/a n/a
Custom Ringtones Yes n/a n/a n/a
Real-Music Ringers - n/a n/a n/a
Data & Network
Data Tethering Yes n/a n/a n/a
WAP / Web Browser Yes n/a n/a n/a
Input
Predictive Text Entry Yes n/a n/a n/a
Side Keys Yes Yes Yes Yes
Touch Screen - Yes Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - Yes Yes Yes
Messaging
Email Client - n/a n/a n/a
EMS / Picture Messaging Yes n/a n/a n/a
Instant Messaging - n/a n/a n/a
MMS - n/a n/a n/a
Text Messaging Templates Yes n/a n/a n/a
Music
FM Radio - - - Yes
Headphone Jack (3.5mm) - - Yes Yes
Music Player - n/a n/a n/a
Photo & Video
TV Output - - - Yes
Productivity
Alarm Yes n/a n/a n/a
Calculator Yes n/a n/a n/a
Calendar Yes n/a n/a n/a
To-Do List Yes n/a n/a n/a
Voice Memo - n/a n/a n/a
Software
Games Yes n/a n/a n/a
Java (J2ME) Yes n/a n/a n/a
Voice
Headset Jack (2.5 mm) Yes n/a n/a n/a
Speaker Phone - - Yes Yes
  * Some versions only
  Samsung SGH-E400 Samsung SPH-i550 ZTE Z998 / Unico LTE HTC EVO 4G
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Phone Samsung SGH-E400 Samsung SPH-i550 ZTE Z998 / Unico LTE HTC EVO 4G

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