Oppo A57 vs verykool s4009 Crystal

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

  s4009 Crystal: 6.9 mm narrower

  A57:

  72.9 mm

  s4009 Crystal:

  66 mm

• Screen diagonal

  s4009 Crystal: 1.2 in smaller diagonal

  A57:

  5.2 in

  s4009 Crystal:

  4 in

• Chipset

  A57:

  Qualcomm MSM8940 Snapdragon 435 (28 nm)

  s4009 Crystal:

  Mediatek MT6570 (28 nm)

• Depth

  A57: 3 mm thinner

  A57:

  7.7 mm

  s4009 Crystal:

  10.7 mm

• Height

  s4009 Crystal: 22.1 mm shorter

  A57:

  149.1 mm

  s4009 Crystal:

  127 mm

• Release year

  A57:

  2016

  s4009 Crystal:

  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 +22.1 mm versus s4009 Crystal

   Width:

   72.9 mm +6.9 mm versus s4009 Crystal

   Depth:

   7.7 mm

   Weight:

   147 g

2. 2. s4009 Crystal

   Height:

   127 mm

   Width:

   66 mm

   Depth:

   10.7 mm +3 mm versus A57

   Weight:

   Unknown

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. s4009 Crystal

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

A57 has approximately 63.7% more rectangular screen area than s4009 Crystal.

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.