Kyocera Echo vs T-Mobile Sidekick 3

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

  Echo: 2.5 mm narrower

  Echo:

  56.5 mm

  Sidekick 3:

  59 mm

• Screen diagonal

  Sidekick 3: 0.9 in smaller diagonal

  Echo:

  3.5 in

  Sidekick 3:

  2.6 in

• Depth

  Echo: 4.8 mm thinner

  Echo:

  17.2 mm

  Sidekick 3:

  22 mm

• Height

  Echo: 15 mm shorter

  Echo:

  115 mm

  Sidekick 3:

  130 mm

• Release year

  Echo:

  2011

  Sidekick 3:

  2006

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. Echo

   Height:

   115 mm

   Width:

   56.5 mm

   Depth:

   17.2 mm

2. 2. Sidekick 3

   Height:

   130 mm +15 mm versus Echo

   Width:

   59 mm +2.5 mm versus Echo

   Depth:

   22 mm +4.8 mm versus Echo

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. Echo

   Screen diagonal:

   3.5 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   34.9 cm²

2. 2. Sidekick 3

   Screen diagonal:

   2.6 in

   Aspect ratio (height:width):

   3:2

   Approximate rectangular screen area:

   20.1 cm²

Echo has approximately 73.2% more rectangular screen area than Sidekick 3.

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.