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Phone Samsung SGH-X640 BlackBerry 7100 / 7105 ZTE C88 Sanyo SCP-3810 / Mirro HTC Desire 555
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? ? 2" diag.
4 : 3
2.4" diag.
4 : 3
5" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
240 x 260 pixels
LCD (Color)
176 x 220 pixels
(~141 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~294 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ? ? 60 Hz
Battery 800 mAh ? 800 mAh 1,000 mAh 2,200 mAh
Processor ? ? ? ? 1.1 GHz Qualcomm Snapdragon 210 (MSM8909)
RAM ? ? ? ? 2 GB
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware 16 GB
Main Camera Yes - Yes 1 megapixel 8 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - - - - 720p HD
Front Camera - - - - 5 megapixel
Weight 3 oz
(85g)
4.3 oz
(122g)
3.46 oz
(98g)
3.97 oz
(112g)
4.93 oz
(140g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.7" x 2.3" x 0.7"
(119 x 58 x 17.8 mm)
3.85" x 1.92" x 0.7"
(98 x 49 x 17.8 mm)
3.82" x 2.01" x 0.71"
(97 x 51 x 18.1 mm)
5.78" x 2.79" x 0.33"
(147 x 71 x 8.4 mm)
Form Factor Clamshell Slab Clamshell Clamshell Slab
Platform / OS (proprietary) BlackBerry OS (proprietary) (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

CDMA: 850, 1900

4G LTE: 2, 4, 5, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

Data Technology GPRS GPRS 1xRTT 1xRTT LTE (Cat 4)
Features 
Flashlight - - - - Yes
GPS / Location - n/a Yes Yes n/a
Accessibility
Adjustable Text Size - n/a - Yes n/a
Hearing Aid Compatible - - - Yes
M4, T4 (very tele-coil compatible)
Yes *
M4, T4 (very tele-coil compatible)
Multiple Languages Yes n/a Yes Yes n/a
TTY/TDD (Digital) - Yes Yes Yes Yes
Alerts
Extra Display - - Yes Yes -
Ringer Profiles - Yes - - -
Connectivity
Bluetooth - Yes Yes Yes Yes
USB - Yes Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Wi-Fi - - - - Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes n/a - Yes n/a
Ringer ID Yes n/a Yes Yes n/a
Voice Dialing - n/a Yes Yes n/a
Customization
Custom Graphics Yes n/a Yes Yes n/a
Custom Ringtones Yes n/a Yes Yes n/a
Real-Music Ringers - n/a Yes Yes n/a
Data & Network
Data Tethering - n/a - Yes n/a
WAP / Web Browser Yes n/a Yes Yes n/a
Input
Predictive Text Entry Yes n/a Yes Yes n/a
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - Yes - - -
Touch Screen - - - - Yes
Capacitive
Memory
Memory Card Slot - - - - Yes
Messaging
Email Client - n/a Yes Yes n/a
EMS / Picture Messaging Yes n/a - - n/a
Instant Messaging - n/a Yes Yes n/a
MMS Yes n/a Yes - n/a
Text Messaging Templates Yes n/a Yes Yes n/a
Music
FM Radio - - - - Yes
Headphone Jack (3.5mm) - - - - Yes
Photo & Video
DLNA - - - - Yes
Miracast - - - - Yes
Productivity
Alarm Yes n/a Yes Yes n/a
Calculator Yes n/a Yes Yes n/a
Calendar Yes n/a Yes Yes n/a
To-Do List Yes n/a - Yes n/a
Voice Memo Yes n/a Yes Yes n/a
Software
BREW - n/a Yes - n/a
Games Yes n/a Yes Yes n/a
Java (J2ME) Yes n/a - Yes n/a
Voice
HD Voice - - - - Yes
Headset Jack (2.5 mm) Yes n/a - Yes n/a
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 BlackBerry 7100 / 7105 ZTE C88 Sanyo SCP-3810 / Mirro HTC Desire 555
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 BlackBerry 7100 / 7105 ZTE C88 Sanyo SCP-3810 / Mirro HTC Desire 555

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