Nokia N81 vs Samsung DoubleTime I857

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: 8 g lighter

    N81:
    140 g
    DoubleTime I857:
    148 g
  • Width

    N81: 12 mm narrower

    N81:
    50 mm
    DoubleTime I857:
    62 mm
  • Screen diagonal

    N81: 0.8 in smaller diagonal

    N81:
    2.4 in
    DoubleTime I857:
    3.2 in
  • Depth

    DoubleTime I857: 2.9 mm thinner

    N81:
    17.9 mm
    DoubleTime I857:
    15 mm
  • Height

    N81: 11 mm shorter

    N81:
    102 mm
    DoubleTime I857:
    113 mm
  • Release year

    N81:
    2007
    DoubleTime I857:
    2011

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 +2.9 mm versus DoubleTime I857
  2. 2. DoubleTime I857

    Height:
    113 mm +11 mm versus N81
    Width:
    62 mm +12 mm versus N81
    Depth:
    15 mm

Weight

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

  1. 1. N81

    140 g

  2. 2. DoubleTime I857

    148 g

    +8 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. DoubleTime I857

    Screen diagonal:
    3.2 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    30.5 cm²

DoubleTime I857 has approximately 70.9% 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

DoubleTime I857: Original memory entry

260 MB · 256 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. DoubleTime I857

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (dedicated slot)

Battery capacity

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

Recorded battery capacity

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

  1. 1. N81

    1050 mAh

  2. 2. DoubleTime I857

    1200 mAh

    +150 mAh versus N81

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. DoubleTime I857

Everyday essentials
Everyday essentials — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Dimensions (HxWxD)
  • 102 Х 50 Х 17.9 mm
  • 113 Х 62 Х 15 mm
Weight
  • 140 g
  • 148 g
Technology
  • TFT
  • TFT
Screen size
  • 2.4" inch
  • 3.2" inch
Screen resolution
  • 240 x 320 px
  • 320 x 480 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 12 MB
  • 96 MB RAM
  • 260 MB
  • 256 MB RAM
Memory card support
  • microSD
  • up to 8 GB (dedicated slot)
  • 2 GB included
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1050 mAh
  • Removable Li-Po
  • 1200 mAh
  • Removable Li-Ion
Operating system OS
  • Symbian OS 9.2
  • Series 60 v3.1 UI
  • Android 2.2 (Froyo)
Chipset Unknown
  • Qualcomm MSM7230
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Touchscreen Unknown
  • capacitive touchscreen
Display colors
  • 16M
  • 256K
Screen area
  • 17.8 cm2
  • 30.5 cm2
Screen format
  • 4:3 (height:width)
  • 3:2 (height:width)
Screen to body ratio
  • 35.0%
  • 43.5%
PPI /points per inch/
  • 167 PPI
  • 180 PPI
Camera and Video
Camera and Video — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Rear camera, main
  • 2 MP
  • Single
  • 3.15 MP
  • Single
Camera specs
  • 2 MP
  • 3.15 MP
  • AF
Functions
  • LED flash
Unknown
Video
  • 320p@15fps
  • 320p
Front camera, selfie
  • 0.3 MP
  • Single
  • 0 MP,
Specifications
  • CIF videocall camera
Unknown
Performance
Performance — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Processor CPU
  • 369 MHz ARM 11
  • 800 MHz Scorpion
Graphics processor GPU Unknown
  • Adreno 205
General specs
General specs — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Release date
  • 2007
  • August
  • 2011
  • October
Colors
  • Cobalt blue
  • Graphite Grey
  • Black/White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 200 EUR
  • 70 EUR
Battery life
  • Stand by time- Up to 410 h Talking time- Up to 4 h (2G) / 3 h (3G)
  • Stand by time- Up to 250 h Talking time- Up to 6 h
Communication and Connectivity
Communication and Connectivity — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
SIM card
  • Mini-SIM
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Speed
  • Yes
  • 384 kbps
  • HSPA 7.2/2 Mbps
GPRS
  • Class 10
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11b/g with UPnP
  • No
GPS
  • No
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 2.0
  • A2DP
  • 3.0
  • A2DP
Harmful irradiation
  • SAR - 0.73 W/kg (head) 0.60 W/kg (body) SAR EU - 0.81 W/kg (head)
  • SAR - 0.54 W/kg (head) 0.97 W/kg (body)
Music and Audio
Music and Audio — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Radio
  • Stereo FM radio
  • No
Others
  • Touch-sensitive Navi wheel
  • Secondary TFT capacitive touchscreen (with multitouch)
  • 320 x 480 pixels
  • 3.2 inches
Other features
Other features — specifications for N81, DoubleTime I857.
SpecificationN81DoubleTime I857
Dop
  • MP3/AAC/MP4 player -Predictive text input -Push to talk -Voice dial/memo -Organizer
  • Sensors Accelerometer
  • proximity
  • compass - MP4/H.264 player -MP3/WAV/eAAC+ player -Organizer -Photo/video editor -Document viewer -Voice memo/dial/commands -Predictive text input - For AT&T