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Phone ZTE Engage LT / Engage MT Samsung SPH-i550 BlackBerry 7750 Samsung Droid Charge
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Not yet released Released Released
Specifications 
Display Size 4" diag.
5 : 3
? ? 4.3" diag.
5 : 3
Display Resolution & Type 480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
320 x 320 pixels
LCD (TFT/TFD)
240 x 240 pixels
LCD (Color)
480 x 800 pixels
(~217 ppi)
AMOLED
Display Refresh 60 Hz ? ? 60 Hz
Battery 1,900 mAh ? ? 1,500 mAh
Processor ? 200 MHz Motorola MX-1 ? 1 GHz Samsung Hummingbird
RAM 1 GB ? ? ?
Storage 4 GB ? raw hardware ? raw hardware ? raw hardware
Main Camera 3 megapixel 1 megapixel - 8 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture WVGA / 480p ? - 720p HD
Front Camera Yes - - 1 megapixel
Weight 5.09 oz
(144g)
? 5.01 oz
(142g)
5.06 oz
(144g)
Dimensions 4.78" x 2.54" x 0.46"
(121 x 64 x 11.7 mm)
3.46" x 2.34" x 1.1"
(88 x 59 x 27.9 mm)
4.76" x 3.03" x 0.71"
(121 x 77 x 18 mm)
5.1" x 2.68" x 0.46"
(130 x 68 x 11.7 mm)
Platform / OS Android Palm OS BlackBerry OS Android
Network Bands

CDMA: 850, 1700, 1900

CDMA: 850, 1900

AMPS: 850

CDMA: 850, 1900

4G LTE: 13

CDMA: 850, 1900

Data Technology EVDO rA 1xRTT 1xRTT LTE (Cat 3)
Features 
Accessibility
Hearing Aid Compatible - - - Yes
TTY/TDD (Digital) Yes Yes Yes Yes
Alerts
Extra Display - Yes - -
Ringer Profiles - - Yes -
Connectivity
Bluetooth Yes - - Yes
Infrared (IR) - Yes - -
USB Yes
Micro-USB
- Yes Yes
Micro-USB
Wi-Fi Yes - - Yes
4 (802.11 b,g,n)
Input
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - Yes -
Touch Screen Yes Yes - Yes
Memory
Memory Card Slot Yes Yes - Yes
Music
Headphone Jack (3.5mm) Yes - - Yes
Photo & Video
DLNA - - - Yes
TV Output - - - Yes
Voice
Speaker Phone Yes - - Yes
  ZTE Engage LT / Engage MT Samsung SPH-i550 BlackBerry 7750 Samsung Droid Charge
  X > < X > < X > < X

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

 
Phone ZTE Engage LT / Engage MT Samsung SPH-i550 BlackBerry 7750 Samsung Droid Charge

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