T-Mobile Sidekick 4G vs verykool RS90

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

  Sidekick 4G: 39 g lighter

  Sidekick 4G:

  162 g

  RS90:

  201 g

• Width

  Sidekick 4G: 14.6 mm narrower

  Sidekick 4G:

  61 mm

  RS90:

  75.6 mm

• Screen diagonal

  Sidekick 4G: 1 in smaller diagonal

  Sidekick 4G:

  3.5 in

  RS90:

  4.5 in

• Depth

  RS90: 2.9 mm thinner

  Sidekick 4G:

  15 mm

  RS90:

  12.1 mm

• Height

  Sidekick 4G: 17 mm shorter

  Sidekick 4G:

  127 mm

  RS90:

  144 mm

• Release year

  Sidekick 4G:

  2011

  RS90:

  2013

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. Sidekick 4G

   Height:

   127 mm

   Width:

   61 mm

   Depth:

   15 mm +2.9 mm versus RS90

2. 2. RS90

   Height:

   144 mm +17 mm versus Sidekick 4G

   Width:

   75.6 mm +14.6 mm versus Sidekick 4G

   Depth:

   12.1 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. Sidekick 4G

   Screen diagonal:

   3.5 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   34.9 cm²

2. 2. RS90

   Screen diagonal:

   4.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   55.8 cm²

RS90 has approximately 60.1% more rectangular screen area than Sidekick 4G.

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.