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Phone Samsung SGH-X640 ZTE Flash Sony Ericsson K750 / W800 / D750 / W700 ZTE Blade Z Max
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 4.5" diag.
16 : 9
? 6" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
720 x 1280 pixels
(~326 ppi)
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
1080 x 1920 pixels
(~367 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? 60 Hz
Battery 800 mAh 1,780 mAh 900 mAh 4,080 mAh
Processor ? 1.5 GHz Qualcomm Snapdragon S4 Plus MSM8960 ? 1.4 GHz Qualcomm Snapdragon 435 (MSM8940)
RAM ? 1 GB ? 2 GB
Storage ? raw hardware 8 GB ? raw hardware 32 GB
Main Camera Yes 12 megapixel 2 megapixel 16 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture - 1080p HD ? 1080p HD
Front Camera - 1 megapixel - 8 megapixel
Weight 3 oz
(85g)
5.2 oz
(147g)
3.49 oz
(99g)
6.58 oz
(186g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.27" x 2.56" x 0.38"
(134 x 65 x 9.7 mm)
3.94" x 1.81" x 0.79"
(100 x 46 x 20.1 mm)
6.51" x 3.28" x 0.33"
(165 x 83 x 8.3 mm)
Form Factor Clamshell Slab Slab Slab
Platform / OS (proprietary) Android (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 25

CDMA: 800, 850, 1900

GSM: 900, 1800, 1900

4G LTE: 2, 4, 5, 12, 66

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

Data Technology GPRS LTE (Cat 3) GPRS LTE (Cat 6)
Features 
Fingerprint Reader - - - Yes
stand-alone
Flashlight - - Yes Yes
GPS / Location - n/a - n/a
Accessibility
Adjustable Text Size - n/a - n/a
Hearing Aid Compatible - Yes
M4, T4 (very tele-coil compatible)
- Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a Yes n/a
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Ringer Profiles - - Yes -
Connectivity
Bluetooth - Yes Yes Yes
Infrared (IR) - - Yes -
Mobile Hotspot - n/a - n/a
NFC - Yes - -
USB - Yes
Micro-USB
Yes Yes
USB Type C
Wi-Fi - Yes
4 (802.11 b,g,n)
- Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes n/a Yes n/a
Ringer ID Yes n/a Yes n/a
Voice Dialing - n/a Yes n/a
Customization
Custom Graphics Yes n/a Yes n/a
Custom Ringtones Yes n/a Yes n/a
Real-Music Ringers - n/a - n/a
Data & Network
Data Tethering - n/a Yes n/a
WAP / Web Browser Yes n/a Yes n/a
Input
Predictive Text Entry Yes n/a Yes n/a
Side Keys Yes Yes Yes Yes
Touch Screen - Yes
Capacitive
- Yes
Capacitive
Memory
Memory Card Slot - Yes Yes Yes
Messaging
Email Client - n/a Yes n/a
EMS / Picture Messaging Yes n/a Yes n/a
Instant Messaging - n/a - n/a
MMS Yes n/a Yes n/a
Text Messaging Templates Yes n/a Yes n/a
Music
FM Radio - - Yes Yes
Headphone Jack (3.5mm) - Yes - Yes
Music Player - n/a Yes n/a
Power
Fast Charging - - - Yes
Productivity
Alarm Yes n/a Yes n/a
Calculator Yes n/a Yes n/a
Calendar Yes n/a Yes n/a
To-Do List Yes n/a Yes n/a
Voice Memo Yes n/a Yes n/a
Software
Games Yes n/a Yes n/a
Java (J2ME) Yes n/a Yes n/a
Voice
HD Voice - Yes - Yes
Headset Jack (2.5 mm) Yes n/a - n/a
Speaker Phone Yes Yes Yes Yes
  Samsung SGH-X640 ZTE Flash Sony Ericsson K750 / W800 / D750 / W700 ZTE Blade Z Max
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Phone Samsung SGH-X640 ZTE Flash Sony Ericsson K750 / W800 / D750 / W700 ZTE Blade Z Max

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