BlackBerry Curve 8520 vs Xiaomi Redmi 4

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

  Curve 8520: 44 g lighter

  Curve 8520:

  106 g

  Redmi 4:

  150 g

• Width

  Curve 8520: 10 mm narrower

  Curve 8520:

  60 mm

  Redmi 4:

  70 mm

• Screen diagonal

  Curve 8520: 2.54 in smaller diagonal

  Curve 8520:

  2.46 in

  Redmi 4:

  5 in

• Depth

  Redmi 4: 5.2 mm thinner

  Curve 8520:

  13.9 mm

  Redmi 4:

  8.7 mm

• Height

  Curve 8520: 30.2 mm shorter

  Curve 8520:

  109 mm

  Redmi 4:

  139.2 mm

• Release year

  Curve 8520:

  2009

  Redmi 4:

  2017

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. Curve 8520

   Height:

   109 mm

   Width:

   60 mm

   Depth:

   13.9 mm +5.2 mm versus Redmi 4

2. 2. Redmi 4

   Height:

   139.2 mm +30.2 mm versus Curve 8520

   Width:

   70 mm +10 mm versus Curve 8520

   Depth:

   8.7 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. Curve 8520

   Screen diagonal:

   2.46 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   18.7 cm²

2. 2. Redmi 4

   Screen diagonal:

   5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   68.9 cm²

Redmi 4 has approximately 267.8% more rectangular screen area than Curve 8520.

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.