Nokia N81 vs Siemens AF51
Nokia N81
Siemens AF51
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 900, 1800, 1900
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3G networkUMTS 2100-
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Speed YesYes, 384 kbps-
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GPRSYesYes
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EDGEYes
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Availability
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Oficially announced2007-112005-11
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Status
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Design
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SIMMini-SIMMini-SIM
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Height102 mm79 mm
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Width50 mm41 mm
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Thickness17.9 mm19.6 mm
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Weight140 g80 g
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ColorsCobalt blue, Graphite greyDolphin Grey, Panther Black
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Display
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Display typeTFTCSTN
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Physical size2.4 inches-
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Resolution240 x 320 pixels130 x 130 pixels
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Pixel density167 ppi-
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Display colors1677721666560
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Hardware
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CPU369 MHz ARM 11
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Memory RAM96 MB-
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Internal storage12 MB-
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Memory cardmicroSD
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Memory card max8 GB-
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Memory card included2 GB-
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OS
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OSSymbian OS 9.2-
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Main camera
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Main camera2 MP
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Primary camera resolution1600 x 1200 pixels-
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Primary camera video320p@15fps-
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Primary camera flashLED flash-
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Selfie camera
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Secondary camera videocallingvideocalling-
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Sound
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3.5mm jackYesNo
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LoudspeakerYesYes
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NotificationsVibration; Downloadable polyphonic, monophonic, MP3 ringtonesVibration; Polyphonic(32) ringtones
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Multimedia
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Radio-No
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Radio FMStereo FM radio-
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Radio visualVisual radio-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g
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WLAN UpnpYes-
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USBmicroUSB 2.0
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Bluetoothv2.0
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Bluetooth A2DPYes-
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GPSNoNo
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Features
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Messaging SMSSMSSMS
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Messaging MMSMMSMMS
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Messaging Instant MessagingInstant Messaging-
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Messaging EmailEmail-
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WAPWAP 2.0/xHTMLWAP 1.2.1
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JavaYesYes
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Java MIDPMIDP 2.0MIDP 1.0
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Browser
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HTMLYes-
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity1050 mAh620 mAh
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Talk time-5 h
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Talk time 2G4 h-
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Talk time 3G3 h-
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Standby time410 h220 h