Oppo A57 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.

• Width

  Redmi 4: 2.9 mm narrower

  A57:

  72.9 mm

  Redmi 4:

  70 mm

• Screen diagonal

  Redmi 4: 0.2 in smaller diagonal

  A57:

  5.2 in

  Redmi 4:

  5 in

• Depth

  A57: 1 mm thinner

  A57:

  7.7 mm

  Redmi 4:

  8.7 mm

• Height

  Redmi 4: 9.9 mm shorter

  A57:

  149.1 mm

  Redmi 4:

  139.2 mm

• Release year

  A57:

  2016

  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. A57

   Height:

   149.1 mm +9.9 mm versus Redmi 4

   Width:

   72.9 mm +2.9 mm versus Redmi 4

   Depth:

   7.7 mm

2. 2. Redmi 4

   Height:

   139.2 mm

   Width:

   70 mm

   Depth:

   8.7 mm +1 mm versus A57

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. A57

   Screen diagonal:

   5.2 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   74.5 cm²

2. 2. Redmi 4

   Screen diagonal:

   5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   68.9 cm²

A57 has approximately 8.2% more rectangular screen area than Redmi 4.

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.