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Phone AT&T Calypso Ericsson R278d Siemens M55 Nokia N97 mini
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 5.5" diag.
18 : 9
? ? 3.2" diag.
16 : 9
Display Resolution & Type 480 x 960 pixels
(~195 ppi)
LCD (TFT/TFD)
101 x 40 pixels 101 x 80 pixels
LCD (Color)
360 x 640 pixels
(~229 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz ? ? ?
Battery 2,500 mAh ? 700 mAh 1,200 mAh
Processor 1.5 GHz MediaTek MT6739 ? ? 434 MHz ARM 11
RAM 1 GB ? ? ?
Storage 16 GB ? raw hardware ? raw hardware 8 GB
Main Camera 5 megapixel - - 5 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture 1080p HD - - VGA (640 x 480)
Front Camera 5 megapixel - - -
Weight 6 oz
(170g)
9.28 oz
(263g)
2.93 oz
(83g)
4.87 oz
(138g)
Dimensions 5.91" x 2.87" x 0.39"
(150 x 73 x 9.9 mm)
5.1" x 2" x 1"
(130 x 51 x 25.4 mm)
3.98" x 1.81" x 0.83"
(101 x 46 x 21.1 mm)
4.45" x 2.07" x 0.56"
(113 x 52 x 14.2 mm)
Form Factor Slab Slab Slab Slide
Platform / OS Android (proprietary) (proprietary) S60 (Symbian)
Network Bands

4G LTE: 2, 4, 5, 12, 14, 30

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

TDMA: 850, 1900

AMPS: 850

GSM: 900, 1800, 1900

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

Data Technology LTE (Cat 4) - GPRS HSDPA 3.6
Features 
Flashlight Yes - - -
GPS / Location n/a - Yes n/a
Accessibility
Hearing Aid Compatible Yes
M3, T4 (very tele-coil compatible)
- - -
Multiple Languages n/a Yes Yes n/a
TTY/TDD (Digital) Yes - Yes -
Alerts
Ringer Profiles - Yes - Yes
Connectivity
Bluetooth Yes - - Yes
USB Yes
USB Type C
- - Yes
Micro-USB
Wi-Fi Yes
4 (802.11 b,g,n)
- - Yes
802.11 b,g
Contacts
Picture ID n/a - - n/a
Ringer ID n/a - - n/a
Voice Dialing n/a - Yes n/a
Customization
Custom Graphics n/a - Yes n/a
Custom Ringtones n/a Yes Yes n/a
Real-Music Ringers n/a - - n/a
Data & Network
Data Tethering n/a Yes Yes n/a
WAP / Web Browser n/a Yes Yes n/a
Input
Predictive Text Entry n/a Yes Yes n/a
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes
Touch Screen Yes
Capacitive
- - Yes
Resistive
Memory
Memory Card Slot Yes - - Yes
Messaging
Email Client n/a - Yes n/a
EMS / Picture Messaging n/a - Yes n/a
MMS n/a - Yes n/a
Text Messaging Templates n/a - - n/a
Music
FM Radio - - - Yes
Headphone Jack (3.5mm) Yes - - Yes
Music Player n/a - - n/a
Stereo Speakers - - - Yes
Photo & Video
TV Output - - - Yes
Video Calling n/a - - n/a
Productivity
Alarm n/a Yes - n/a
Calculator n/a - - n/a
Calendar n/a - Yes n/a
To-Do List n/a - - n/a
Voice Memo n/a - - n/a
Software
Games n/a - Yes n/a
Java (J2ME) n/a - Yes n/a
Voice
HD Voice Yes - - -
Speaker Phone Yes - Yes Yes
  AT&T Calypso Ericsson R278d Siemens M55 Nokia N97 mini
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Phone AT&T Calypso Ericsson R278d Siemens M55 Nokia N97 mini

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