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Phone Samsung SGH-E640 Coolpad Quattro 4G BlackBerry Key2 LE ZTE ZMAX 2
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 4" diag.
5 : 3
4.5" diag.
5 : 3
5.5" diag.
16 : 9
Display Resolution & Type 176 x 220 pixels
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
1080 x 1620 pixels
(~433 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~267 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz 60 Hz
Battery 800 mAh 1,600 mAh 3,000 mAh 3,000 mAh
Processor ? ? 1.8 GHz Qualcomm Snapdragon 636 1.2 GHz Qualcomm Snapdragon 400 (MSM8916)
RAM ? ? 4 GB 2 GB
Storage ? raw hardware 512 MB 32 GB * 16 GB
Main Camera 1 megapixel 3 megapixel 13 megapixel 8 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture QCIF (176 x 144) VGA (640 x 480) 4K UHD 720p HD
Front Camera - Yes 8 megapixel 2 megapixel
Weight 3.17 oz
(90g)
3.31 oz
(94g)
5.5 oz
(156g)
5.99 oz
(170g)
Dimensions 3.37" x 1.78" x 0.93"
(86 x 45 x 23.6 mm)
4.96" x 2.6" x 0.51"
(126 x 66 x 13 mm)
5.92" x 2.83" x 0.33"
(150 x 72 x 8.4 mm)
6.06" x 2.99" x 0.37"
(154 x 76 x 9.4 mm)
Form Factor Clamshell Slab Slab Slab
Platform / OS (proprietary) Android Android Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 2, 4

CDMA: 850, 1700, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 28, 29, 38, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 12

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

Data Technology GPRS LTE (Cat 3) LTE (Cat 13) LTE (Cat 4)
Features 
Fingerprint Reader - - Yes
stand-alone
-
Flashlight - - Yes -
GPS / Location - n/a n/a n/a
Accessibility
Adjustable Text Size - n/a n/a n/a
Hearing Aid Compatible - Yes Yes Yes
Multiple Languages Yes n/a n/a n/a
TTY/TDD (Digital) - Yes Yes Yes
Alerts
Extra Display Yes - - -
Connectivity
Bluetooth Yes Yes Yes Yes
Mobile Hotspot - n/a n/a n/a
NFC - - Yes -
USB Yes Yes Yes
USB Type C
Yes
Micro-USB
Wi-Fi - Yes Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes n/a n/a n/a
Ringer ID Yes 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 Yes n/a n/a n/a
Data & Network
Data Tethering - n/a n/a n/a
Dual-SIM - - Yes * -
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
Text Keyboard, Hardware - - Yes -
Touch Screen - Yes Yes Yes
Memory
Memory Card Slot - Yes Yes Yes
Messaging
Email Client Yes 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 Yes 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 Yes
Music Player Yes n/a n/a n/a
Power
Fast Charging - - 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 Yes 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
HD Voice - - Yes -
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-E640 Coolpad Quattro 4G BlackBerry Key2 LE ZTE ZMAX 2
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Phone Samsung SGH-E640 Coolpad Quattro 4G BlackBerry Key2 LE ZTE ZMAX 2

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