O2 XDA Serra vs Samsung i640

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

  i640: 17 g lighter

  XDA Serra:

  165 g

  i640:

  148 g

• Width

  XDA Serra: 10 mm narrower

  XDA Serra:

  51 mm

  i640:

  61 mm

• Screen diagonal

  i640: 0.4 in smaller diagonal

  XDA Serra:

  2.8 in

  i640:

  2.4 in

• Depth

  i640: 1.2 mm thinner

  XDA Serra:

  18.1 mm

  i640:

  16.9 mm

• Height

  i640: 7.6 mm shorter

  XDA Serra:

  102 mm

  i640:

  94.4 mm

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. XDA Serra

   Height:

   102 mm +7.6 mm versus i640

   Width:

   51 mm

   Depth:

   18.1 mm +1.2 mm versus i640

2. 2. i640

   Height:

   94.4 mm

   Width:

   61 mm +10 mm versus XDA Serra

   Depth:

   16.9 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. XDA Serra

   Screen diagonal:

   2.8 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   24.3 cm²

2. 2. i640

   Screen diagonal:

   2.4 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   17.8 cm²

XDA Serra has approximately 36.1% more rectangular screen area than i640.

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.