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Phone	Nokia Lumia 810	ZTE Prelude / Avail 2	Nokia E66	Samsung Memoir SGH-T929	Siemens SL65
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4.3" diag. 5 : 3	3.5" diag. 5 : 3	2.4" diag. 4 : 3	3.1" diag. 5 : 3	?
Display Resolution & Type	480 x 800 pixels (~217 ppi) AMOLED	320 x 480 pixels (~165 ppi) LCD (TFT/TFD)	240 x 320 pixels (~167 ppi) LCD (TFT/TFD)	240 x 400 pixels (~150 ppi) LCD (TFT/TFD)	130 x 130 pixels LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	?
Battery	1,800 mAh	1,500 mAh	1,000 mAh	?	700 mAh
Processor	1.5 GHz Qualcomm Snapdragon	1 GHz Qualcomm Snapdragon MSM7225A	?	?	?
RAM	1 GB	512 MB	?	?	?
Storage	8 GB	4 GB	? raw hardware	? raw hardware	? raw hardware
Main Camera	8 megapixel	2 megapixel	3 megapixel	8 megapixel	-
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	1080p HD	VGA (640 x 480)	QVGA (320 x 240)	?	?
Front Camera	1 megapixel	-	-	-	-
Weight	5.11 oz (145g)	4.4 oz (125g)	4.27 oz (121g)	4.4 oz (125g)	3.49 oz (99g)
Dimensions	5" x 2.69" x 0.44" (127 x 68 x 11.2 mm)	4.6" x 2.44" x 0.45" (117 x 62 x 11.4 mm)	4.21" x 1.93" x 0.51" (107 x 49 x 13 mm)	4.17" x 2.11" x 0.55" (106 x 54 x 14 mm)	3.55" x 1.87" x 0.82" (90 x 47 x 20.8 mm)
Form Factor	Slab	Slab	Slide	Slab	Slide
Platform / OS	Windows	Android	S60 (Symbian)	(proprietary)	(proprietary)
Network Bands	WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	WCDMA: 2, 5 GSM: 850, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 *	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900	GSM: 900, 1800, 1900
Data Technology	HSPA+ 42	HSPA 7.2	HSDPA 3.6	HSDPA 3.6	GPRS
Features
GPS / Location	n/a	n/a	n/a	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)	-	Yes M3 (mostly compatible)	-
Multiple Languages	n/a	n/a	n/a	Yes	Yes
TTY/TDD (Digital)	Yes	Yes	-	Yes	-
Alerts
Ringer Profiles	-	-	Yes	Yes	Yes
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	-
Infrared (IR)	-	-	Yes	-	Yes
Mobile Hotspot	n/a	n/a	n/a	-	-
NFC	Yes	-	-	-	-
USB	Yes Micro-USB	Yes	Yes Micro-USB	Yes	Yes
Wi-Fi	Yes 4 (802.11 a,b,g,n)	Yes 4 (802.11 b,g,n)	Yes 802.11 b,g	-	-
Contacts
Picture ID	n/a	n/a	n/a	Yes	Yes
Ringer ID	n/a	n/a	n/a	-	Yes
Voice Dialing	n/a	n/a	n/a	Yes	-
Customization
Custom Graphics	n/a	n/a	n/a	Yes	Yes
Custom Ringtones	n/a	n/a	n/a	Yes	Yes
Real-Music Ringers	n/a	n/a	n/a	Yes	-
Data & Network
Data Tethering	n/a	n/a	n/a	-	Yes
WAP / Web Browser	n/a	n/a	n/a	Yes	Yes
Input
Predictive Text Entry	n/a	n/a	n/a	Yes	Yes
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	Yes Capacitive	Yes Capacitive	-	Yes	-
Memory
Memory Card Slot	Yes	Yes	Yes	Yes	-
Messaging
Email Client	n/a	n/a	n/a	Yes	Yes
EMS / Picture Messaging	n/a	n/a	n/a	-	Yes
Instant Messaging	n/a	n/a	n/a	Yes	-
MMS	n/a	n/a	n/a	Yes	Yes
Text Messaging Templates	n/a	n/a	n/a	Yes	Yes
Music
FM Radio	-	-	Yes	-	-
Headphone Jack (3.5mm)	Yes	Yes	-	-	-
Music Player	n/a	n/a	n/a	Yes	-
Photo & Video
TV Output	-	-	-	Yes	-
Video Calling	n/a	n/a	n/a	-	-
Power
Wireless Charging	Yes	-	-	-	-
Productivity
Alarm	n/a	n/a	n/a	Yes	Yes
Calculator	n/a	n/a	n/a	Yes	Yes
Calendar	n/a	n/a	n/a	Yes	Yes
To-Do List	n/a	n/a	n/a	Yes	Yes
Voice Memo	n/a	n/a	n/a	Yes	Yes
Software
Games	n/a	n/a	n/a	Yes	Yes
Java (J2ME)	n/a	n/a	n/a	-	Yes
Voice
Headset Jack (2.5 mm)	n/a	n/a	n/a	-	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Nokia Lumia 810	ZTE Prelude / Avail 2	Nokia E66	Samsung Memoir SGH-T929	Siemens SL65
	X >	< X >	< X >	< X >	< X

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


Phone	Nokia Lumia 810	ZTE Prelude / Avail 2	Nokia E66	Samsung Memoir SGH-T929	Siemens SL65