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Phone Samsung SGH-X640 ZTE Blade Max 2s Cricket Debut S2 / AT&T Calypso 4 HTC EVO 4G LTE Samsung Galaxy J2 / J2 Pure / J2 Dash
Current U.S. Carriers (none) (none) AT&T (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 6" diag.
18 : 9
6.1" diag.
19.5 : 9
4.7" diag.
16 : 9
5" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1080 x 2160 pixels
(~402 ppi)
LCD (TFT/TFD)
720 x 1560 pixels
(~282 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~312 ppi)
LCD (TFT/TFD)
540 x 960 pixels
(~220 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz 60 Hz 60 Hz
Battery 800 mAh 4,000 mAh 3,000 mAh 2,000 mAh 2,600 mAh
Processor ? 1.4 GHz Qualcomm Snapdragon 435 (MSM8940) 2 GHz MediaTek Helio A22 (MT6761WB) 1.5 GHz Qualcomm Snapdragon S4 1.4 GHz Samsung Exynos 7570
RAM ? 2 GB 3 GB 1 GB 2 GB
Storage ? raw hardware 32 GB 64 GB 16 GB 16 GB
Main Camera Yes 13 megapixel 8 megapixel 8 megapixel 8 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - 1080p HD ? 1080p HD 1080p HD
Front Camera - 5 megapixel 5 megapixel 1 megapixel 5 megapixel
Weight 3 oz
(85g)
6.35 oz
(180g)
5.64 oz
(160g)
5.05 oz
(143g)
5.43 oz
(154g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
6.26" x 2.96" x 0.32"
(159 x 75 x 8.1 mm)
6.11" x 2.87" x 0.34"
(155 x 73 x 8.6 mm)
5.3" x 2.7" x 0.35"
(135 x 69 x 8.9 mm)
5.65" x 2.84" x 0.35"
(144 x 72 x 8.9 mm)
Form Factor Clamshell Slab Slab Slab Slab
Platform / OS (proprietary) Android Android Android Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 2, 3, 4, 5, 7, 12, 13, 25, 26, 41

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30, 66

WCDMA: 1, 2, 4, 5, 8

4G LTE: 25

CDMA: 800, 850, 1900

4G LTE: 2, 3, 4, 5, 7, 12, 14, 66, 71

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

Data Technology GPRS LTE (Cat 6) LTE (Cat 4) LTE (Cat 3) LTE (Cat 4)
Features 
Fingerprint Reader - Yes
stand-alone
- - -
Flashlight - Yes Yes - Yes
GPS / Location - n/a n/a n/a n/a
Accessibility
Hearing Aid Compatible - Yes
M4, T3 (mostly tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a n/a n/a n/a
TTY/TDD (Digital) - Yes - Yes Yes
Connectivity
Bluetooth - Yes Yes Yes Yes
Mobile Hotspot - n/a n/a n/a n/a
NFC - - - Yes -
USB - Yes
USB Type C
Yes
USB Type C
Yes
Micro-USB
Yes
Micro-USB
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 a,b,g,n)
Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes n/a n/a n/a n/a
Ringer ID Yes n/a n/a n/a n/a
Voice Dialing - n/a n/a n/a n/a
Customization
Custom Graphics Yes n/a n/a n/a n/a
Custom Ringtones Yes n/a n/a n/a n/a
Real-Music Ringers - n/a n/a n/a n/a
Data & Network
Data Tethering - n/a n/a n/a n/a
WAP / Web Browser Yes n/a n/a n/a n/a
Input
Predictive Text Entry Yes n/a n/a n/a n/a
Side Keys Yes Yes Yes Yes Yes
Touch Screen - Yes
Capacitive
Yes
Capacitive
Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - Yes Yes Yes Yes
Messaging
Email Client - n/a n/a n/a n/a
EMS / Picture Messaging Yes n/a n/a n/a n/a
Instant Messaging - n/a n/a n/a n/a
MMS Yes n/a n/a n/a n/a
Text Messaging Templates Yes n/a n/a n/a n/a
Music
Headphone Jack (3.5mm) - Yes Yes Yes Yes
Music Player - n/a n/a n/a n/a
Photo & Video
DLNA - - - Yes -
Power
Fast Charging - Yes Yes - -
Productivity
Alarm Yes n/a n/a n/a n/a
Calculator Yes n/a n/a n/a n/a
Calendar Yes n/a n/a n/a n/a
To-Do List Yes n/a n/a n/a n/a
Voice Memo Yes n/a n/a n/a n/a
Software
Games Yes n/a n/a n/a n/a
Java (J2ME) Yes n/a n/a n/a n/a
Voice
HD Voice - Yes Yes Yes -
Headset Jack (2.5 mm) Yes n/a n/a n/a n/a
Speaker Phone Yes Yes Yes Yes Yes
  Samsung SGH-X640 ZTE Blade Max 2s Cricket Debut S2 / AT&T Calypso 4 HTC EVO 4G LTE Samsung Galaxy J2 / J2 Pure / J2 Dash
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 ZTE Blade Max 2s Cricket Debut S2 / AT&T Calypso 4 HTC EVO 4G LTE Samsung Galaxy J2 / J2 Pure / J2 Dash

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