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Phone HP iPAQ hw6510 / hw6515 Samsung Galaxy A21 Visible Midnight Nokia 6555 Palm Treo 600 (GSM)
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 6.5" diag.
20 : 9
6.5" diag.
20 : 9
2" diag.
4 : 3
?
Display Resolution & Type 240 x 240 pixels
LCD (TFT/TFD)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~269 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
160 x 160 pixels
LCD (Color)
Display Refresh ? 60 Hz 60 Hz ? ?
Battery 1,200 mAh 4,000 mAh 4,000 mAh 1,020 mAh ?
Processor 312 MHz Intel XScale PXA272 2 GHz MediaTek Helio P35 (MT6765) MediaTek Helio P22 (MT6762) ? ?
RAM ? 3 GB 3 GB ? ?
Storage ? raw hardware 32 GB 32 GB ? raw hardware ? raw hardware
Main Camera 1 megapixel 16 megapixel 13 megapixel 1 megapixel Yes
Wide Camera - 8 megapixel 5 megapixel - -
Tele Camera - - - - -
Video Capture ? 1080p HD 1080p HD QCIF (176 x 144) -
Front Camera - 13 megapixel 8 megapixel - -
Weight 5.8 oz
(164g)
6.81 oz
(193g)
6.35 oz
(180g)
3.42 oz
(97g)
5.92 oz
(168g)
Dimensions 4.65" x 2.8" x 0.71"
(118 x 71 x 18 mm)
6.61" x 3.02" x 0.32"
(168 x 77 x 8.1 mm)
6.53" x 3" x 0.34"
(166 x 76 x 8.6 mm)
3.92" x 1.74" x 0.77"
(100 x 44 x 19.6 mm)
4.41" x 2.36" x 0.87"
(112 x 60 x 22.1 mm)
Form Factor Slab Slab Slab Clamshell Slab
Platform / OS Windows Mobile Professional Android Android (proprietary) Palm OS
Network Bands

GSM: 850, 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 7, 12, 13, 66

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

*

GSM: 850, 900, 1800, 1900

Data Technology EDGE LTE (Cat 6) LTE (Cat 4) WCDMA (UMTS) GPRS
Features 
Fingerprint Reader - Yes
stand-alone
Yes
stand-alone
- -
Flashlight - Yes Yes - -
GPS / Location n/a n/a n/a - n/a
Accessibility
Adjustable Text Size n/a n/a n/a Yes n/a
Hearing Aid Compatible - Yes
M4, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
-
Multiple Languages n/a n/a n/a Yes n/a
TTY/TDD (Digital) Yes Yes - Yes Yes
Alerts
Extra Display - - - Yes -
Ringer Profiles Yes - - Yes -
Connectivity
Bluetooth Yes Yes Yes Yes -
Infrared (IR) Yes - - - Yes
NFC - Yes - - -
USB Yes Yes
USB Type C
Yes
USB Type C
Yes
Micro-USB
Yes
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
- -
Contacts
Picture ID n/a n/a n/a Yes n/a
Ringer ID n/a n/a n/a Yes n/a
Voice Dialing n/a n/a n/a Yes n/a
Customization
Custom Graphics n/a n/a n/a Yes n/a
Custom Ringtones n/a n/a n/a Yes n/a
Real-Music Ringers n/a n/a n/a Yes n/a
Data & Network
Data Tethering n/a n/a n/a Yes n/a
WAP / Web Browser n/a n/a n/a Yes n/a
Input
Predictive Text Entry n/a n/a n/a Yes n/a
Side Keys - Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - Yes
Touch Screen Yes Yes
Capacitive
Yes
Capacitive
- Yes
Memory
Memory Card Slot Yes Yes Yes Yes Yes
Messaging
Email Client n/a n/a n/a Yes n/a
Instant Messaging n/a n/a n/a Yes n/a
MMS n/a n/a n/a Yes n/a
Text Messaging Templates n/a n/a n/a Yes n/a
Music
Headphone Jack (3.5mm) - Yes Yes - -
Music Player n/a n/a n/a Yes n/a
Power
Fast Charging - Yes - - -
Wireless Charging - - Yes - -
Productivity
Alarm n/a n/a n/a Yes n/a
Calculator n/a n/a n/a Yes n/a
Calendar n/a n/a n/a Yes n/a
To-Do List n/a n/a n/a Yes n/a
Voice Memo n/a n/a n/a Yes n/a
Software
Games n/a n/a n/a Yes n/a
Java (J2ME) n/a n/a n/a Yes n/a
Voice
HD Voice - Yes Yes - -
Headset Jack (2.5 mm) n/a n/a n/a Yes n/a
Push-To-Talk - - - Yes * -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  HP iPAQ hw6510 / hw6515 Samsung Galaxy A21 Visible Midnight Nokia 6555 Palm Treo 600 (GSM)
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone HP iPAQ hw6510 / hw6515 Samsung Galaxy A21 Visible Midnight Nokia 6555 Palm Treo 600 (GSM)

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