Nokia 6788 vs vivo X21 UD

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

  6788: 19.9 mm narrower

  6788:

  54.9 mm

  X21 UD:

  74.8 mm

• Screen diagonal

  6788: 3.48 in smaller diagonal

  6788:

  2.8 in

  X21 UD:

  6.28 in

• Rear camera layout

  6788:

  Single

  X21 UD:

  Dual

• Depth

  X21 UD: 11.5 mm thinner

  6788:

  18.9 mm

  X21 UD:

  7.4 mm

• Height

  6788: 48.9 mm shorter

  6788:

  105.6 mm

  X21 UD:

  154.5 mm

• Release year

  6788:

  2009

  X21 UD:

  2018

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. 6788

   Height:

   105.6 mm

   Width:

   54.9 mm

   Depth:

   18.9 mm +11.5 mm versus X21 UD

2. 2. X21 UD

   Height:

   154.5 mm +48.9 mm versus 6788

   Width:

   74.8 mm +19.9 mm versus 6788

   Depth:

   7.4 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. 6788

   Screen diagonal:

   2.8 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   24.3 cm²

2. 2. X21 UD

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

X21 UD has approximately 305.4% more rectangular screen area than 6788.

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.