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Phone Samsung SGH-D307 Nokia 6255i / 6256i Samsung SGH-A657 Kyocera DuraForce Nokia Lumia 521 / 520
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? ? ? 4.5" diag.
16 : 9
4" diag.
5 : 3
Display Resolution & Type 176 x 220 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
720 x 1280 pixels
(~326 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ? 60 Hz ?
Battery ? 1,070 mAh 1,420 mAh 3,100 mAh 1,430 mAh
Processor ? ? ? 1.4 GHz Qualcomm Snapdragon 400 (MSM8928) 1 GHz Qualcomm Snapdragon S4 MSM8270
RAM ? ? ? 2 GB 512 MB
Storage ? raw hardware ? raw hardware ? raw hardware 16 GB 8 GB
Main Camera - Yes - 8 megapixel 5 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - ? - 1080p HD 720p HD
Front Camera - - - 2 megapixel -
Weight 4.3 oz
(122g)
4.23 oz
(120g)
4.34 oz
(123g)
7.06 oz
(200g)
4.39 oz
(124g)
Dimensions 3.7" x 1.9" x 0.85"
(94 x 48 x 21.6 mm)
3.36" x 1.87" x 0.97"
(85 x 47 x 24.6 mm)
4.53" x 2.05" x 0.77"
(115 x 52 x 19.6 mm)
5.39" x 2.78" x 0.55"
(137 x 71 x 14 mm)
4.72" x 2.52" x 0.39"
(120 x 64 x 9.9 mm)
Form Factor Clamshell Clamshell Slab Slab Slab
Platform / OS (proprietary) (proprietary) (proprietary) Android Windows
Network Bands

GSM: 850, 1800, 1900

CDMA: 850, 1900

AMPS: 850

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

4G LTE: 1, 2, 4, 5, 7, 17

WCDMA: 1, 2, 5, 8

GSM: 850, 900, 1800, 1900

*

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

Data Technology EDGE 1xRTT HSDPA 3.6 LTE (Cat 3) HSPA+ 21
Features 
Flashlight - - Yes Yes -
GPS / Location - Yes Yes n/a n/a
Ruggedized - - Yes Yes -
Water-Resistant - - - Yes
IPX8 (SCUBA)
-
Accessibility
Adjustable Text Size - - - n/a n/a
Hearing Aid Compatible Yes Yes - Yes Yes
Multiple Languages Yes Yes Yes n/a n/a
TTY/TDD (Digital) Yes Yes Yes Yes Yes
Alerts
Extra Display Yes Yes - - -
Ringer Profiles - Yes - - -
Connectivity
Bluetooth Yes Yes Yes Yes Yes
Infrared (IR) - Yes - - -
Mobile Hotspot - - - n/a n/a
NFC - - - Yes -
USB Yes Yes Yes Yes
Micro-USB
Yes
Wi-Fi - - - Yes
5 (802.11 a,ac,b,g,n)
Yes
Contacts
Picture ID Yes Yes Yes n/a n/a
Ringer ID Yes Yes Yes n/a n/a
Voice Dialing Yes Yes - n/a n/a
Customization
Custom Graphics Yes Yes Yes n/a n/a
Custom Ringtones Yes Yes Yes n/a n/a
Real-Music Ringers Yes Yes Yes n/a n/a
Data & Network
Data Tethering Yes Yes Yes n/a n/a
WAP / Web Browser Yes Yes Yes n/a n/a
Input
Predictive Text Entry Yes Yes Yes n/a n/a
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen - - - Yes Yes
Memory
Memory Card Slot - Yes Yes Yes Yes
Messaging
Email Client Yes Yes Yes n/a n/a
EMS / Picture Messaging Yes Yes * - n/a n/a
Instant Messaging - - Yes n/a n/a
MMS Yes Yes Yes n/a n/a
Text Messaging Templates Yes Yes Yes n/a n/a
Music
FM Radio - Yes - - -
Headphone Jack (3.5mm) - - - Yes Yes
Music Player - Yes * Yes n/a n/a
Stereo Speakers - - - Yes -
Photo & Video
DLNA - - - Yes -
Miracast - - - Yes -
Power
Wireless Charging - - - Yes -
Productivity
Alarm Yes Yes Yes n/a n/a
Calculator Yes Yes Yes n/a n/a
Calendar Yes Yes Yes n/a n/a
To-Do List Yes Yes Yes n/a n/a
Voice Memo Yes Yes Yes n/a n/a
Software
BREW - Yes * - n/a n/a
Games Yes Yes Yes n/a n/a
Java (J2ME) Yes Yes * Yes n/a n/a
Voice
Headset Jack (2.5 mm) - Yes - n/a n/a
Push-To-Talk - - Yes Yes * -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-D307 Nokia 6255i / 6256i Samsung SGH-A657 Kyocera DuraForce Nokia Lumia 521 / 520
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-D307 Nokia 6255i / 6256i Samsung SGH-A657 Kyocera DuraForce Nokia Lumia 521 / 520

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