Oppo A31 vs Samsung Galaxy J4

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.

• Display technology

  OLED versus LCD

  A31:

  LCD

  Galaxy J4:

  OLED

• Weight

  Galaxy J4: 5 g lighter

  A31:

  180 g

  Galaxy J4:

  175 g

• Width

  A31: 1.7 mm narrower

  A31:

  75.5 mm

  Galaxy J4:

  77.2 mm

• Screen diagonal

  Galaxy J4: 1 in smaller diagonal

  A31:

  6.5 in

  Galaxy J4:

  5.5 in

• Rear camera layout

  A31:

  Triple

  Galaxy J4:

  Single

• Height

  Galaxy J4: 12.2 mm shorter

  A31:

  163.9 mm

  Galaxy J4:

  151.7 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. A31

   Height:

   163.9 mm +12.2 mm versus Galaxy J4

   Width:

   75.5 mm

   Depth:

   8.3 mm

2. 2. Galaxy J4

   Height:

   151.7 mm

   Width:

   77.2 mm +1.7 mm versus A31

   Depth:

   8.1 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. A31

   Screen diagonal:

   6.5 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   102 cm²

2. 2. Galaxy J4

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

A31 has approximately 22.3% more rectangular screen area than Galaxy J4.

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.