BlackBerry 7730 vs Oppo A31

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

  7730: 38 g lighter

  7730:

  142 g

  A31:

  180 g

• Width

  A31: 1.5 mm narrower

  7730:

  77 mm

  A31:

  75.5 mm

• Screen diagonal

  7730: 3.5 in smaller diagonal

  7730:

  3 in

  A31:

  6.5 in

• Depth

  A31: 9.7 mm thinner

  7730:

  18 mm

  A31:

  8.3 mm

• Height

  7730: 42.9 mm shorter

  7730:

  121 mm

  A31:

  163.9 mm

• Release year

  7730:

  2004

  A31:

  2020

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. 7730

   Height:

   121 mm

   Width:

   77 mm +1.5 mm versus A31

   Depth:

   18 mm +9.7 mm versus A31

2. 2. A31

   Height:

   163.9 mm +42.9 mm versus 7730

   Width:

   75.5 mm

   Depth:

   8.3 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. 7730

   Screen diagonal:

   3 in

   Aspect ratio (height:width):

   1:1

   Approximate rectangular screen area:

   29 cm²

2. 2. A31

   Screen diagonal:

   6.5 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   102 cm²

A31 has approximately 251.4% more rectangular screen area than 7730.

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.

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.

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