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Phone Samsung SGH-X640 HTC Bolt Nokia 6255i / 6256i Samsung SCH-A610
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 5.5" diag.
16 : 9
? ?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2560 pixels
(~534 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? ?
Battery 800 mAh 3,200 mAh 1,070 mAh 1,300 mAh
Processor ? 2 GHz Qualcomm Snapdragon 810 (MSM8994) ? ?
RAM ? 3 GB ? ?
Storage ? raw hardware 32 GB ? raw hardware ? raw hardware
Main Camera Yes 16 megapixel Yes Yes
Wide Camera - - - -
Tele Camera - - - -
Video Capture - 4K UHD ? -
Front Camera - 8 megapixel - -
Weight 3 oz
(85g)
6.14 oz
(174g)
4.23 oz
(120g)
4.23 oz
(120g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
6.05" x 3.04" x 0.32"
(154 x 77 x 8.1 mm)
3.36" x 1.87" x 0.97"
(85 x 47 x 24.6 mm)
3.5" x 1.9" x 0.9"
(89 x 48 x 22.9 mm)
Form Factor Clamshell Slab Clamshell Clamshell
Platform / OS (proprietary) Android (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

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

WCDMA: 1, 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

AMPS: 850

CDMA: 850, 1900

Data Technology GPRS LTE (Cat 9) 1xRTT 1xRTT
Features 
Fingerprint Reader - Yes
stand-alone
- -
Flashlight - Yes - -
GPS / Location - n/a Yes Yes
Water-Resistant - Yes
IPX7 (snorkeling)
- -
Accessibility
Hearing Aid Compatible - Yes
M4, T4 (very tele-coil compatible)
Yes
M4 (very compatible)
-
Multiple Languages Yes n/a Yes Yes
TTY/TDD (Digital) - Yes Yes -
Alerts
Extra Display - - Yes -
Ringer Profiles - - Yes -
Connectivity
Bluetooth - Yes Yes -
Infrared (IR) - - Yes -
NFC - Yes - -
USB - Yes
USB Type C
Yes -
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
- -
Contacts
Picture ID Yes n/a Yes Yes
Ringer ID Yes n/a Yes Yes
Voice Dialing - n/a Yes Yes
Customization
Custom Graphics Yes n/a Yes Yes
Custom Ringtones Yes n/a Yes Yes
Real-Music Ringers - n/a Yes -
Data & Network
Data Tethering - n/a Yes Yes
WAP / Web Browser Yes n/a Yes Yes
Input
Predictive Text Entry Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes
Touch Screen - Yes
Capacitive
- -
Memory
Memory Card Slot - Yes Yes -
Messaging
Email Client - n/a Yes -
EMS / Picture Messaging Yes n/a Yes * Yes
MMS Yes n/a Yes Yes
Text Messaging Templates Yes n/a Yes Yes
Music
FM Radio - - Yes -
Music Player - n/a Yes * -
Photo & Video
DLNA - Yes - -
Miracast - Yes - -
Power
Fast Charging - Yes - -
Productivity
Alarm Yes n/a Yes Yes
Calculator Yes n/a Yes Yes
Calendar Yes n/a Yes Yes
To-Do List Yes n/a Yes Yes
Voice Memo Yes n/a Yes Yes
Software
BREW - n/a Yes * Yes
Games Yes n/a Yes Yes
Java (J2ME) Yes n/a Yes * -
Voice
HD Voice - Yes - -
Headset Jack (2.5 mm) Yes n/a Yes Yes
Speaker Phone Yes Yes Yes -
  * Some versions only
  Samsung SGH-X640 HTC Bolt Nokia 6255i / 6256i Samsung SCH-A610
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Phone Samsung SGH-X640 HTC Bolt Nokia 6255i / 6256i Samsung SCH-A610

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