Allview A4 Duo vs BlackBerry Key2

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: 57.4 g lighter

  A4 Duo:

  110.6 g

  Key2:

  168 g

• Width

  A4 Duo: 8.6 mm narrower

  A4 Duo:

  63.2 mm

  Key2:

  71.8 mm

• Screen diagonal

  A4 Duo: 1 in smaller diagonal

  A4 Duo:

  3.5 in

  Key2:

  4.5 in

• Rear camera layout

  A4 Duo:

  Single

  Key2:

  Dual

• Depth

  Key2: 3.5 mm thinner

  A4 Duo:

  12 mm

  Key2:

  8.5 mm

• Height

  A4 Duo: 35.3 mm shorter

  A4 Duo:

  116.1 mm

  Key2:

  151.4 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. A4 Duo

   Height:

   116.1 mm

   Width:

   63.2 mm

   Depth:

   12 mm +3.5 mm versus Key2

2. 2. Key2

   Height:

   151.4 mm +35.3 mm versus A4 Duo

   Width:

   71.8 mm +8.6 mm versus A4 Duo

   Depth:

   8.5 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. A4 Duo

   Screen diagonal:

   3.5 in

   Aspect ratio (height:width):

   3:2

   Approximate rectangular screen area:

   36.5 cm²

2. 2. Key2

   Screen diagonal:

   4.5 in

   Aspect ratio (height:width):

   3:2

   Approximate rectangular screen area:

   60.3 cm²

Key2 has approximately 65.3% more rectangular screen area than A4 Duo.

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.

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.