Nokia N81 vs Siemens SX66

Compare recorded specifications, size and practical differences.

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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.

  • Weight

    N81: 70 g lighter

    N81:
    140 g
    SX66:
    210 g
  • Width

    N81: 21 mm narrower

    N81:
    50 mm
    SX66:
    71 mm
  • Screen diagonal

    N81: 1.1 in smaller diagonal

    N81:
    2.4 in
    SX66:
    3.5 in
  • Height

    N81: 23 mm shorter

    N81:
    102 mm
    SX66:
    125 mm
  • Release year

    N81:
    2007
    SX66:
    2004

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.

  1. 1. N81

    Height:
    102 mm
    Width:
    50 mm
    Depth:
    17.9 mm
  2. 2. SX66

    Height:
    125 mm +23 mm versus N81
    Width:
    71 mm +21 mm versus N81
    Depth:
    18 mm

Weight

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

  1. 1. N81

    140 g

  2. 2. SX66

    210 g

    +70 g versus N81

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.

  1. 1. N81

    Screen diagonal:
    2.4 in
    Aspect ratio (height:width):
    4:3
    Approximate rectangular screen area:
    17.8 cm²
  2. 2. SX66

    Screen diagonal:
    3.5 in
    Aspect ratio (height:width):
    4:3
    Approximate rectangular screen area:
    37.9 cm²

SX66 has approximately 112.7% more rectangular screen area than N81.

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

SX66: Original memory entry

128 MB RAM

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. SX66

NFC:
Unknown
Headphone jack:
No
Memory card support:
See details SDIO/MMC

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. SX66

Everyday essentials
Everyday essentials — specifications for N81, SX66.
SpecificationN81SX66
Dimensions (HxWxD)
  • 102 Х 50 Х 17.9 mm
  • 125 Х 71 Х 18 mm
Weight
  • 140 g
  • 210 g
Technology
  • TFT
  • TFT
Screen size
  • 2.4" inch
  • 3.5" inch
Screen resolution
  • 240 x 320 px
  • 240 x 320 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 12 MB
  • 96 MB RAM
  • 128 MB RAM
Memory card support
  • microSD
  • up to 8 GB (dedicated slot)
  • 2 GB included
  • SDIO/MMC
Battery Capacity 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 2003 SE PocketPC
Headphone jack
  • Yes
  • No
Display
Display — specifications for N81, SX66.
SpecificationN81SX66
Touchscreen Unknown
  • resistive touchscreen
Display colors
  • 16M
  • 65K
Screen area
  • 17.8 cm2
  • 37.9 cm2
Screen format
  • 4:3 (height:width)
  • 4:3 (height:width)
Screen to body ratio
  • 35.0%
  • 42.7%
PPI /points per inch/
  • 167 PPI
  • 114 PPI
Camera and Video
Camera and Video — specifications for N81, SX66.
SpecificationN81SX66
Rear camera, main
  • 2 MP
  • Single
  • 0 MP,
Camera specs
  • 2 MP
Unknown
Functions
  • LED flash
Unknown
Video
  • 320p@15fps
Unknown
Front camera, selfie
  • 0.3 MP
  • Single
  • 0 MP,
Specifications
  • CIF videocall camera
Unknown
Performance
Performance — specifications for N81, SX66.
SpecificationN81SX66
Processor CPU
  • 369 MHz ARM 11
  • Intel Xscale PXA272 520 MHz
General specs
General specs — specifications for N81, SX66.
SpecificationN81SX66
Release date
  • 2007
  • August
  • 2004
  • Q4
Colors
  • Cobalt blue
  • Graphite Grey
  • Silver
Historical recorded price Legacy 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 — specifications for N81, SX66.
SpecificationN81SX66
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
  • No
Wi-Fi
  • Wi-Fi 802.11b/g with UPnP
  • Wi-Fi 802.11b
GPS
  • No
  • No
USB
  • microUSB 2.0
  • Proprietary
Bluetooth
  • 2.0
  • A2DP
  • Yes
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 — specifications for N81, SX66.
SpecificationN81SX66
Radio
  • Stereo FM radio
  • No
Others
  • Touch-sensitive Navi wheel
  • Downloadable logos
Other features
Other features — specifications for N81, SX66.
SpecificationN81SX66
Dop
  • MP3/AAC/MP4 player -Predictive text input -Push to talk -Voice dial/memo -Organizer
  • Infrared port - Microsoft ActiveSync -MP3/AAC player -Predictive text input