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Phone	Palm Treo 600 (CDMA)	Samsung SGH-A657	ZTE Axon Pro / Axon	LG PM-225	Nokia Lumia 521 / 520
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Not yet released	Released	Released
Display Size	?	?	5.5" diag. 16 : 9	?	4" diag. 5 : 3
Display Resolution & Type	160 x 160 pixels LCD (Color)	176 x 220 pixels LCD (TFT/TFD)	1440 x 2560 pixels (~534 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (STN)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	?	?
Battery	?	1,420 mAh	3,000 mAh	1,000 mAh	1,430 mAh
Processor	?	?	2 GHz Qualcomm Snapdragon 810 (MSM8994)	?	1 GHz Qualcomm Snapdragon S4 MSM8270
RAM	?	?	4 GB *	?	512 MB
Storage	? raw hardware	? raw hardware	32 GB *	? raw hardware	8 GB
Main Camera	Yes	-	13 megapixel	Yes	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	-	4K UHD	-	720p HD
Front Camera	-	-	8 megapixel	-	-
Weight	6.2 oz (176g)	4.34 oz (123g)	6.1 oz (173g)	3.35 oz (95g)	4.39 oz (124g)
Dimensions	4.41" x 2.36" x 0.87" (112 x 60 x 22.1 mm)	4.53" x 2.05" x 0.77" (115 x 52 x 19.6 mm)	6.06" x 2.9" x 0.37" (154 x 74 x 9.4 mm)	3.53" x 1.76" x 0.93" (90 x 45 x 23.6 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)
Form Factor	Slab	Slab	Slab	Clamshell	Slab
Platform / OS	Palm OS	(proprietary)	Android	(proprietary)	Windows
Network Bands	CDMA: 850, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	4G LTE: 1, 2, 3, 4, 5, 7, 12, 13, 17, 29, 30 WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900 AMPS: 850	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *
Data Technology	1xRTT	HSDPA 3.6	LTE (Cat 6)	1xRTT	HSPA+ 21
Features
Flashlight	-	Yes	Yes	-	-
GPS / Location	n/a	Yes	n/a	Yes	n/a
Ruggedized	-	Yes	-	-	-
Accessibility
Adjustable Text Size	n/a	-	n/a	-	n/a
Hearing Aid Compatible	-	-	Yes M3, T4 (very tele-coil compatible)	-	Yes M3, T4 (very tele-coil compatible)
Multiple Languages	n/a	Yes	n/a	Yes	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	-	-	Yes	-
Connectivity
Bluetooth	-	Yes	Yes	-	Yes
Infrared (IR)	Yes	-	-	-	-
Mobile Hotspot	n/a	-	n/a	-	n/a
NFC	-	-	Yes	-	-
USB	Yes	Yes	Yes Micro-USB	Yes	Yes
Wi-Fi	-	-	Yes 5 (802.11 a,ac,b,g,n)	-	Yes
Contacts
Picture ID	n/a	Yes	n/a	Yes	n/a
Ringer ID	n/a	Yes	n/a	Yes	n/a
Voice Dialing	n/a	-	n/a	Yes	n/a
Customization
Custom Graphics	n/a	Yes	n/a	Yes	n/a
Custom Ringtones	n/a	Yes	n/a	Yes	n/a
Real-Music Ringers	n/a	Yes	n/a	-	n/a
Data & Network
Data Tethering	n/a	Yes	n/a	-	n/a
WAP / Web Browser	n/a	Yes	n/a	Yes	n/a
Input
Predictive Text Entry	n/a	Yes	n/a	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	Yes	-	-	-	-
Touch Screen	Yes	-	Yes Capacitive	-	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	-	-	Yes
Messaging
Email Client	n/a	Yes	n/a	-	n/a
Instant Messaging	n/a	Yes	n/a	-	n/a
MMS	n/a	Yes	n/a	-	n/a
Text Messaging Templates	n/a	Yes	n/a	-	n/a
Music
FM Radio	-	-	Yes	-	-
Headphone Jack (3.5mm)	-	-	Yes	-	Yes
Music Player	n/a	Yes	n/a	-	n/a
Photo & Video
Miracast	-	-	Yes	-	-
Power
Fast Charging	-	-	Yes	-	-
Productivity
Alarm	n/a	Yes	n/a	Yes	n/a
Calculator	n/a	Yes	n/a	Yes	n/a
Calendar	n/a	Yes	n/a	Yes	n/a
To-Do List	n/a	Yes	n/a	-	n/a
Voice Memo	n/a	Yes	n/a	Yes	n/a
Software
Games	n/a	Yes	n/a	Yes	n/a
Java (J2ME)	n/a	Yes	n/a	Yes	n/a
Voice
HD Voice	-	-	Yes	-	-
Headset Jack (2.5 mm)	n/a	-	n/a	Yes	n/a
Push-To-Talk	-	Yes	-	-	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Palm Treo 600 (CDMA)	Samsung SGH-A657	ZTE Axon Pro / Axon	LG PM-225	Nokia Lumia 521 / 520
	X >	< X >	< X >	< X >	< X

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


Phone	Palm Treo 600 (CDMA)	Samsung SGH-A657	ZTE Axon Pro / Axon	LG PM-225	Nokia Lumia 521 / 520