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Nokia N81

Nokia N78

Network
Technology	GSM / UMTS	GSM / HSPA
2G bands	GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900
3G Network	UMTS 2100	HSDPA 900 / 2100
		HSDPA 850 / 1900 - American version
Speed	Yes, 384 kbps	HSPA 3.6/0.384 Mbps

Launch
Announced	2007, August. Released 2007, November	2008, February. Released 2008, May
Status	Discontinued	Discontinued

Body
Dimensions	102 x 50 x 17.9 mm, 86 cc (4.02 x 1.97 x 0.70 in)	113 x 49 x 15.1 mm, 76.5 cc (4.45 x 1.93 x 0.59 in)
Weight	140 g (4.94 oz)	101.8 g (3.56 oz)
SIM	Mini-SIM	Mini-SIM

Display
Type	TFT, 16M colors	TFT, 16M colors
Size	2.4 inches, 17.8 cm2 (~35.0% screen-to-body ratio)	2.4 inches, 17.8 cm2 (~32.2% screen-to-body ratio)
Resolution	240 x 320 pixels, 4:3 ratio (~167 ppi density)	240 x 320 pixels, 4:3 ratio (~167 ppi density)
	Touch-sensitive Navi wheel	Touch-sensitive Navi wheel

Platform
OS	Symbian OS 9.2, Series 60 v3.1 UI	Symbian, S60 rel. 3.2
CPU	369 MHz ARM 11	369 MHz ARM 11

Memory
Card slot	microSDHC (dedicated slot), 2 GB included	microSD (dedicated slot)
Internal	12MB 96MB RAM	76MB 96MB RAM

Main Camera
Modules	2 MP	3.15 MP, AF
Features	LED flash	Carl Zeiss optics, LED flash
Video	320p@15fps	480p@15fps

Selfie Camera
Modules	CIF videocall camera	CIF videocall camera
Video

Sound
Loudspeaker	Yes	Yes, with stereo speakers
3.5mm jack	Yes	Yes

Comms
WLAN	Wi-Fi 802.11b/g with UPnP	Wi-Fi 802.11 b/g, UPnP technology
Bluetooth	2.0, A2DP	2.0, A2DP
Positioning	No	GPS, A-GPS; Nokia Maps
Infrared port	No	No
Radio	Stereo FM radio	Stereo FM radio, RDS; FM transmitter
USB	microUSB 2.0	microUSB 2.0

Features
Sensors
	MP3/AAC/MP4 player Predictive text input Push to talk Voice dial/memo Organizer	WMV/RV/MP4/3GP player MP3/WMA/WAV/RA/AAC/M4A player Push to Talk Voice command/dial Organizer Printing Document viewer (Word, Excel, PowerPoint, PDF) Predictive text input Photo/video editor

Battery
Type	Removable Li-Po 1050 mAh battery (BT-6MT)	Removable Li-Ion 1200 mAh battery (BL-6F)
Stand-by	Up to 410 h	Up to 320 h (2G) / 312 h (3G)
Talk time	Up to 4 h (2G) / 3 h (3G)	Up to 4 h 20 min (2G) / 3 h 10 min (3G)

Misc
Colors	Cobalt blue, Graphite grey	Brown, Blue, White
SAR	0.73 W/kg (head)     0.60 W/kg (body)	1.26 W/kg (head)     1.04 W/kg (body)
SAR EU	0.81 W/kg (head)	1.00 W/kg (head)
Price	About 200 EUR	About 170 EUR

Tests
Loudspeaker		Voice 70dB / Noise 66dB / Ring 75dB
Audio quality		Noise -76.1dB / Crosstalk -72.37dB