Allview A4 Duo vs BlackBerry 6720

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

  A4 Duo: 27.4 g lighter

  A4 Duo:

  110.6 g

  6720:

  138 g

• Width

  A4 Duo: 13.8 mm narrower

  A4 Duo:

  63.2 mm

  6720:

  77 mm

• Screen diagonal

  6720: 0.5 in smaller diagonal

  A4 Duo:

  3.5 in

  6720:

  3 in

• Depth

  A4 Duo: 6 mm thinner

  A4 Duo:

  12 mm

  6720:

  18 mm

• Height

  A4 Duo: 4.9 mm shorter

  A4 Duo:

  116.1 mm

  6720:

  121 mm

• Release year

  A4 Duo:

  2013

  6720:

  2003

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. A4 Duo

   Height:

   116.1 mm

   Width:

   63.2 mm

   Depth:

   12 mm

2. 2. 6720

   Height:

   121 mm +4.9 mm versus A4 Duo

   Width:

   77 mm +13.8 mm versus A4 Duo

   Depth:

   18 mm +6 mm versus A4 Duo

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. A4 Duo

   Screen diagonal:

   3.5 in

   Aspect ratio (height:width):

   3:2

   Approximate rectangular screen area:

   36.5 cm²

2. 2. 6720

   Screen diagonal:

   3 in

   Aspect ratio (height:width):

   1:1

   Approximate rectangular screen area:

   29 cm²

A4 Duo has approximately 25.6% more rectangular screen area than 6720.

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.

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.