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Phone Huawei Ascend XT Samsung SGH-P850 / P858 T-Mobile REVVL 4 Samsung Sidekick 4G Siemens CF75
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Not yet released
Specifications 
Display Size 6" diag.
16 : 9
? 6.2" diag.
19 : 9
3.5" diag.
5 : 3
?
Display Resolution & Type 720 x 1280 pixels
(~245 ppi)
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
720 x 1520 pixels
(~270 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~267 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (STN)
Display Refresh 60 Hz ? 60 Hz 60 Hz ?
Battery 3,000 mAh 950 mAh 3,500 mAh ? 600 mAh
Processor 1.5 GHz Qualcomm Snapdragon 615 (MSM8939) ? 2 GHz MediaTek Helio A22 (MT6761) 1 GHz Samsung Hummingbird Cortex A8 ?
RAM 2 GB ? 2 GB ? ?
Storage 16 GB ? raw hardware 32 GB ? raw hardware ? raw hardware
Main Camera 8 megapixel 3 megapixel 13 megapixel 3 megapixel Yes
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture 720p HD ? 1080p HD WVGA / 480p -
Front Camera 2 megapixel - 5 megapixel Yes -
Weight 7.27 oz
(206g)
4.23 oz
(120g)
5.59 oz
(158g)
5.7 oz
(162g)
3.17 oz
(90g)
Dimensions 6.45" x 3.3" x 0.35"
(164 x 84 x 8.9 mm)
3.77" x 1.86" x 0.96"
(96 x 47 x 24.4 mm)
6.26" x 2.99" x 0.32"
(159 x 76 x 8.1 mm)
5" x 2.42" x 0.6"
(127 x 61 x 15.2 mm)
3.43" x 1.73" x 1.26"
(87 x 44 x 32 mm)
Form Factor Slab Clamshell Slab Slide Clamshell
Platform / OS Android (proprietary) Android Android (proprietary)
Network Bands

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

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

GSM: 900, 1800, 1900

4G LTE: 2, 4, 5, 7, 12, 25, 26, 41, 66, 71

WCDMA: 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

WCDMA: 1, 4

GSM: 850, 900, 1800, 1900

GSM: 900, 1800, 1900

Data Technology LTE (Cat 4) EDGE LTE (Cat 6) HSPA+ 21 EDGE
Features 
Fingerprint Reader - - Yes
stand-alone
- -
Flashlight Yes - Yes - -
GPS / Location n/a - n/a n/a -
Accessibility
Hearing Aid Compatible Yes - Yes Yes -
Multiple Languages n/a Yes n/a n/a Yes
TTY/TDD (Digital) Yes - Yes Yes -
Alerts
Extra Display - Yes - - Yes
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
-
Infrared (IR) - - - - Yes
Mobile Hotspot n/a - n/a n/a -
USB Yes
Micro-USB
Yes Yes
USB Type C
Yes
Micro-USB
Yes
Wi-Fi Yes
4 (802.11 b,g,n)
- Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID n/a Yes n/a n/a -
Ringer ID n/a Yes n/a n/a -
Voice Dialing n/a - n/a n/a -
Customization
Custom Graphics n/a Yes n/a n/a Yes
Custom Ringtones n/a Yes n/a n/a Yes
Real-Music Ringers n/a Yes n/a n/a -
Data & Network
Data Tethering n/a - n/a n/a Yes
WAP / Web Browser n/a Yes n/a n/a Yes
Input
Predictive Text Entry n/a Yes n/a n/a Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes -
Touch Screen Yes - Yes Yes -
Memory
Memory Card Slot Yes Yes Yes Yes -
Messaging
Email Client n/a Yes n/a n/a Yes
EMS / Picture Messaging n/a - n/a n/a Yes
Instant Messaging n/a - n/a n/a -
MMS n/a Yes n/a n/a Yes
Text Messaging Templates n/a Yes n/a n/a Yes
Music
FM Radio Yes - Yes - -
Headphone Jack (3.5mm) Yes - Yes Yes -
Music Player n/a Yes n/a n/a -
Stereo Speakers - Yes - - -
Photo & Video
DLNA - - - Yes -
TV Output - Yes - - -
Productivity
Alarm n/a Yes n/a n/a Yes
Calculator n/a Yes n/a n/a Yes
Calendar n/a Yes n/a n/a Yes
To-Do List n/a - n/a n/a Yes
Voice Memo n/a Yes n/a n/a Yes
Software
Games n/a Yes n/a n/a Yes
Java (J2ME) n/a Yes n/a n/a Yes
Voice
HD Voice Yes - Yes - -
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  Huawei Ascend XT Samsung SGH-P850 / P858 T-Mobile REVVL 4 Samsung Sidekick 4G Siemens CF75
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Huawei Ascend XT Samsung SGH-P850 / P858 T-Mobile REVVL 4 Samsung Sidekick 4G Siemens CF75

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