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Phone Samsung SGH-X640 CAT S61 ZTE ZMAX 2
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 5.2" diag.
16 : 9
5.5" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1080 x 1920 pixels
(~424 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~267 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz
Battery 800 mAh 4,500 mAh 3,000 mAh
Processor ? 2.2 GHz Qualcomm Snapdragon 630 1.2 GHz Qualcomm Snapdragon 400 (MSM8916)
RAM ? 4 GB 2 GB
Storage ? raw hardware 64 GB 16 GB
Main Camera Yes 16 megapixel 8 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - 4K UHD 720p HD
Front Camera - 8 megapixel 2 megapixel
Weight 3 oz
(85g)
9.03 oz
(256g)
5.99 oz
(170g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.91" x 2.99" x 0.51"
(150 x 76 x 13 mm)
6.06" x 2.99" x 0.37"
(154 x 76 x 9.4 mm)
Form Factor Clamshell Slab Slab
Platform / OS (proprietary) Android Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 25, 26, 28, 29, 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 13) LTE (Cat 4)
Features 
Barometer - Yes -
Flashlight - Yes -
GPS / Location - n/a n/a
Ruggedized - Yes -
Water-Resistant - Yes
IPX8 (SCUBA)
-
Accessibility
Adjustable Text Size - n/a n/a
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a n/a
TTY/TDD (Digital) - - Yes
Connectivity
Bluetooth - Yes Yes
Mobile Hotspot - n/a n/a
NFC - Yes -
USB - Yes
USB Type C
Yes
Micro-USB
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes n/a n/a
Ringer ID Yes n/a n/a
Voice Dialing - n/a n/a
Customization
Custom Graphics Yes n/a n/a
Custom Ringtones Yes n/a n/a
Real-Music Ringers - n/a n/a
Data & Network
Data Tethering - n/a n/a
Dual-SIM - Yes * -
WAP / Web Browser Yes n/a n/a
Input
Predictive Text Entry Yes n/a n/a
Side Keys Yes Yes Yes
Touch Screen - Yes Yes
Capacitive
Memory
Memory Card Slot - Yes Yes
Messaging
Email Client - n/a n/a
EMS / Picture Messaging Yes n/a n/a
Instant Messaging - n/a n/a
MMS Yes n/a n/a
Text Messaging Templates Yes n/a n/a
Music
FM Radio - Yes -
Headphone Jack (3.5mm) - Yes Yes
Music Player - n/a n/a
Power
Fast Charging - Yes -
Productivity
Alarm Yes n/a n/a
Calculator Yes n/a n/a
Calendar Yes n/a n/a
To-Do List Yes n/a n/a
Voice Memo Yes n/a n/a
Software
Games Yes n/a n/a
Java (J2ME) Yes n/a n/a
Voice
Headset Jack (2.5 mm) Yes n/a n/a
Speaker Phone Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 CAT S61 ZTE ZMAX 2
  X > < X > < X

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Phone Samsung SGH-X640 CAT S61 ZTE ZMAX 2

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