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Phone Samsung SGH-X640 Samsung Galaxy S8+ Samsung SGH-A157 Motorola i580 HTC EVO Design 4G / Hero S (CDMA)
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 6.2" diag.
18.5 : 9
1.8" diag.
4 : 3
? 4" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2960 pixels
(~531 ppi)
AMOLED
128 x 160 pixels
(~116 ppi)
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
540 x 960 pixels
(~275 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? ? 60 Hz
Battery 800 mAh 3,500 mAh 800 mAh ? 1,520 mAh
Processor ? 2.3 GHz Qualcomm Snapdragon 835 (MSM8998) ? ? 1.2 GHz Qualcomm Snapdragon S2 MSM8655
RAM ? 4 GB ? ? 768 MB
Storage ? raw hardware 64 GB 256 MB ? raw hardware 4 GB
Main Camera Yes 12 megapixel - 1 megapixel 5 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - 4K UHD - ? 720p HD
Front Camera - 8 megapixel - - 1 megapixel
Weight 3 oz
(85g)
6.1 oz
(173g)
2.99 oz
(85g)
4.9 oz
(139g)
5.22 oz
(148g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
6.28" x 2.89" x 0.32"
(160 x 73 x 8.1 mm)
3.83" x 1.84" x 0.65"
(97 x 47 x 16.5 mm)
3.68" x 2.2" x 1.2"
(93 x 56 x 30.5 mm)
4.78" x 2.44" x 0.46"
(122 x 62 x 11.8 mm)
Form Factor Clamshell Slab Clamshell Clamshell Slab
Platform / OS (proprietary) Android (proprietary) (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

iDEN: 800

4G WiMAX: 41

WCDMA: 1, 8

CDMA: 800, 850, 1900

GSM: 850, 1900

*

Data Technology GPRS LTE (Cat 16) ? WiDEN WiMAX
Features 
Fingerprint Reader - Yes
stand-alone
- - -
Flashlight - Yes - - Yes
GPS / Location - n/a Yes Yes n/a
Ruggedized - - - Yes -
VR-ready - Yes - - -
Water-Resistant - Yes
IPX8 (SCUBA)
- - -
Accessibility
Adjustable Text Size - n/a Yes - n/a
Hearing Aid Compatible - Yes Yes Yes Yes
Multiple Languages Yes n/a Yes Yes n/a
TTY/TDD (Digital) - Yes Yes Yes Yes
Alerts
Extra Display - - - Yes -
Ringer Profiles - - Yes Yes -
Connectivity
Bluetooth - Yes - Yes Yes
MirrorLink - Yes - - -
Mobile Hotspot - n/a - - n/a
NFC - Yes - - -
USB - Yes
USB Type C
Yes
Micro-USB
- 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 Yes Yes n/a
Ringer ID Yes n/a Yes Yes n/a
Voice Dialing - n/a - 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 - 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
Touch Screen - Yes - - Yes
Memory
Memory Card Slot - Yes - 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 Yes Yes n/a
Text Messaging Templates Yes n/a Yes Yes n/a
Music
FM Radio - - - - Yes
Headphone Jack (3.5mm) - Yes - - Yes
Music Player - n/a - Yes * n/a
Photo & Video
DLNA - - - - Yes
Power
Fast Charging - Yes - - -
Wireless Charging - Yes - - -
Productivity
Alarm Yes n/a 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
Games Yes n/a - 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
Push-To-Talk - - - Yes -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Samsung Galaxy S8+ Samsung SGH-A157 Motorola i580 HTC EVO Design 4G / Hero S (CDMA)
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung Galaxy S8+ Samsung SGH-A157 Motorola i580 HTC EVO Design 4G / Hero S (CDMA)

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