O2 XDA 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: 7 mm narrower

  XDA:

  73 mm

  s4009 Crystal:

  66 mm

• Screen diagonal

  XDA: 0.5 in smaller diagonal

  XDA:

  3.5 in

  s4009 Crystal:

  4 in

• Depth

  s4009 Crystal: 7.3 mm thinner

  XDA:

  18 mm

  s4009 Crystal:

  10.7 mm

• Height

  s4009 Crystal: 2 mm shorter

  XDA:

  129 mm

  s4009 Crystal:

  127 mm

• Release year

  XDA:

  2003

  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. XDA

   Height:

   129 mm +2 mm versus s4009 Crystal

   Width:

   73 mm +7 mm versus s4009 Crystal

   Depth:

   18 mm +7.3 mm versus s4009 Crystal

   Weight:

   201 g

2. 2. s4009 Crystal

   Height:

   127 mm

   Width:

   66 mm

   Depth:

   10.7 mm

   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. XDA

   Screen diagonal:

   3.5 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   37.9 cm²

2. 2. s4009 Crystal

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

s4009 Crystal has approximately 20% more rectangular screen area than XDA.

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.

At least two unambiguous positive capacity values are needed for a chart. Original entries remain in the specifications.

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.