i-mate SP4m vs Nokia N81

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

  SP4m: 40 g lighter

  SP4m:

  100 g

  N81:

  140 g

• Width

  SP4m: 2 mm narrower

  SP4m:

  48 mm

  N81:

  50 mm

• Screen diagonal

  SP4m: 0.2 in smaller diagonal

  SP4m:

  2.2 in

  N81:

  2.4 in

• Depth

  N81: 1.1 mm thinner

  SP4m:

  19 mm

  N81:

  17.9 mm

• Height

  N81: 7 mm shorter

  SP4m:

  109 mm

  N81:

  102 mm

• Release year

  SP4m:

  2005

  N81:

  2007

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. SP4m

   Height:

   109 mm +7 mm versus N81

   Width:

   48 mm

   Depth:

   19 mm +1.1 mm versus N81

2. 2. N81

   Height:

   102 mm

   Width:

   50 mm +2 mm versus SP4m

   Depth:

   17.9 mm

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. SP4m

   Screen diagonal:

   2.2 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   15 cm²

2. 2. N81

   Screen diagonal:

   2.4 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   17.8 cm²

N81 has approximately 19% more rectangular screen area than SP4m.

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.

Practical features

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

Battery capacity

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

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.