Posh Icon HD X551 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.

• Weight

  Icon HD X551: 75 g lighter

  Icon HD X551:

  115 g

  Sidekick 3:

  190 g

• Width

  Sidekick 3: 20 mm narrower

  Icon HD X551:

  79 mm

  Sidekick 3:

  59 mm

• Screen diagonal

  Sidekick 3: 2.9 in smaller diagonal

  Icon HD X551:

  5.5 in

  Sidekick 3:

  2.6 in

• Depth

  Icon HD X551: 13.8 mm thinner

  Icon HD X551:

  8.2 mm

  Sidekick 3:

  22 mm

• Height

  Sidekick 3: 23.2 mm shorter

  Icon HD X551:

  153.2 mm

  Sidekick 3:

  130 mm

• Release year

  Icon HD X551:

  2015

  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. Icon HD X551

   Height:

   153.2 mm +23.2 mm versus Sidekick 3

   Width:

   79 mm +20 mm versus Sidekick 3

   Depth:

   8.2 mm

2. 2. Sidekick 3

   Height:

   130 mm

   Width:

   59 mm

   Depth:

   22 mm +13.8 mm versus Icon HD X551

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. Icon HD X551

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

2. 2. Sidekick 3

   Screen diagonal:

   2.6 in

   Aspect ratio (height:width):

   3:2

   Approximate rectangular screen area:

   20.1 cm²

Icon HD X551 has approximately 314.3% 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.

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.