T-Mobile Sidekick 4G vs vivo U3

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: 31 g lighter

  Sidekick 4G:

  162 g

  U3:

  193 g

• Width

  Sidekick 4G: 15.5 mm narrower

  Sidekick 4G:

  61 mm

  U3:

  76.5 mm

• Screen diagonal

  Sidekick 4G: 3.03 in smaller diagonal

  Sidekick 4G:

  3.5 in

  U3:

  6.53 in

• Rear camera layout

  Sidekick 4G:

  Single

  U3:

  Triple

• Depth

  U3: 6.1 mm thinner

  Sidekick 4G:

  15 mm

  U3:

  8.9 mm

• Height

  Sidekick 4G: 35.2 mm shorter

  Sidekick 4G:

  127 mm

  U3:

  162.2 mm

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 +6.1 mm versus U3

2. 2. U3

   Height:

   162.2 mm +35.2 mm versus Sidekick 4G

   Width:

   76.5 mm +15.5 mm versus Sidekick 4G

   Depth:

   8.9 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. U3

   Screen diagonal:

   6.53 in

   Aspect ratio (height:width):

   19.5:9

   Approximate rectangular screen area:

   104.7 cm²

U3 has approximately 200.2% 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.

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.