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Nokia N81 vs O2 Cosmo

Compare recorded specifications, size and practical differences.

Nokia N81

Nokia N81

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O2 Cosmo

O2 Cosmo

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

  • WeightCosmo: 10 g lighterCosmo: 130 g · N81: 140 g
  • WidthN81: 12 mm narrowerN81: 50 mm · Cosmo: 62 mm
  • DepthCosmo: 4.9 mm thinnerCosmo: 13 mm · N81: 17.9 mm
  • HeightN81: 9 mm shorterN81: 102 mm · Cosmo: 111 mm
  • Release year2007 / 2006N81: 2007 · Cosmo: 2006

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

Front
N81: 102 × 50 mm 1 Cosmo: 111 × 62 mm 2
Side
N81: 102 × 17.9 mm 1 Cosmo: 111 × 13 mm 2
  1. 1. N81
    Height
    102 mm
    Width
    50 mm
    Depth
    17.9 mm+4.9 mm versus Cosmo
    Weight
    140 g
  2. 2. Cosmo
    Height
    111 mm+9 mm versus N81
    Width
    62 mm+12 mm versus N81
    Depth
    13 mm
    Weight
    130 g
Weight

Bars start at zero and share a scale within this chart.

  1. 1. N81140 g

    +10 g versus Cosmo

  2. 2. Cosmo130 g

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

Screen size
N81: 2.4 in, 4:3, About 17.8 cm² rectangular area 1 Cosmo: 2.4 in, 4:3, About 17.8 cm² rectangular area 2
  1. 1. N81 2.4 in · 4:3 About 17.8 cm² rectangular area
  2. 2. Cosmo 2.4 in · 4:3 About 17.8 cm² rectangular area

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

N81: Original memory entry

12 MB · 96 MB RAM

Cosmo: Original memory entry

64 MB RAM · 128 MB ROM

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. N81

NFC
Unknown
Headphone jack
Yes
Memory card support
See details microSD · up to 8 GB (dedicated slot) · 2 GB included

2. Cosmo

NFC
Unknown
Headphone jack
No
Memory card support
See details microSD (dedicated slot)

Battery capacity

Capacity is not battery life. No endurance test is implied.

At least two unambiguous positive capacity values are needed for a chart. Original entries remain in the specifications.

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. N812. Cosmo

Everyday essentials
Everyday essentials
SpecificationN81Cosmo
Dimensions (HxWxD)
  • 102 Х 50 Х 17.9 mm
  • 111 Х 62 Х 13 mm
Weight
  • 140 g
  • 130 g
Technology
  • TFT
  • TFT
Screen size
  • 2.4" inch
  • 2.4" inch
Screen resolution
  • 240 x 320 px
  • 240 x 320 px
Internal memoryRecorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 12 MB
  • 96 MB RAM
  • 64 MB RAM
  • 128 MB ROM
Memory card support
  • microSD
  • up to 8 GB (dedicated slot)
  • 2 GB included
  • microSD (dedicated slot)
BatteryCapacity is not battery life. No endurance test is implied.
  • 1050 mAh
  • Removable Li-Po
  • 0 mAh,
Operating system OS
  • Symbian OS 9.2
  • Series 60 v3.1 UI
  • Microsoft Windows Mobile 5.0 Smartphone
Chipset Unknown
  • TI OMAP 850
Headphone jack
  • Yes
  • No
Display
Display
SpecificationN81Cosmo
Display colors
  • 16M
  • 65K
Screen area
  • 17.8 cm2
  • 17.8 cm2
Screen format
  • 4:3 (height:width)
  • 4:3 (height:width)
Screen to body ratio
  • 35.0%
  • 25.9%
PPI /points per inch/
  • 167 PPI
  • 167 PPI
Camera and Video
Camera and Video
SpecificationN81Cosmo
Rear camera, main
  • 2 MP
  • Single
  • 1.3 MP
  • Single
Camera specs
  • 2 MP
  • 1.3 MP
Functions
  • LED flash
Unknown
Video
  • 320p@15fps
  • Yes
Front camera, selfie
  • 0.3 MP
  • Single
  • 0 MP,
Specifications
  • CIF videocall camera
Unknown
Performance
Performance
SpecificationN81Cosmo
Processor CPU
  • 369 MHz ARM 11
  • 200 MHz ARM926EJ-S
General specs
General specs
SpecificationN81Cosmo
Release date
  • 2007
  • August
  • 2006
  • September
Colors
  • Cobalt blue
  • Graphite Grey
Unknown
Historical recorded priceLegacy catalogue value; date unknown. Not a current offer.
  • 200 EUR
Unknown
Battery life
  • Stand by time- Up to 410 h Talking time- Up to 4 h (2G) / 3 h (3G)
  • Stand by time- Up to 200 h Talking time- Up to 4 h
Communication and Connectivity
Communication and Connectivity
SpecificationN81Cosmo
SIM card
  • Mini-SIM
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Unknown
Speed
  • Yes
  • 384 kbps
Unknown
GPRS
  • Class 10
  • Class 10
Edge
  • Yes
  • Class 10
Wi-Fi
  • Wi-Fi 802.11b/g with UPnP
  • Wi-Fi 802.11b
GPS
  • No
  • No
USB
  • microUSB 2.0
  • miniUSB
Bluetooth
  • 2.0
  • A2DP
  • 2.0
Harmful irradiation
  • SAR - 0.73 W/kg (head) 0.60 W/kg (body) SAR EU - 0.81 W/kg (head)
Unknown
Music and Audio
Music and Audio
SpecificationN81Cosmo
Radio
  • Stereo FM radio
  • No
Others
  • Touch-sensitive Navi wheel
  • HTC JOGGR touch-sensitive navigation bar
Other features
Other features
SpecificationN81Cosmo
Dop
  • MP3/AAC/MP4 player -Predictive text input -Push to talk -Voice dial/memo -Organizer
  • Infrared port - MP3/AAC player -Pocket Office -Predictive text input -Organizer - HTC Excalibur platform