Apple iPhone 3G vs vivo X21

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

  iPhone 3G: 23.2 g lighter

  iPhone 3G:

  133 g

  X21:

  156.2 g

• Width

  iPhone 3G: 12.7 mm narrower

  iPhone 3G:

  62.1 mm

  X21:

  74.8 mm

• Screen diagonal

  iPhone 3G: 2.78 in smaller diagonal

  iPhone 3G:

  3.5 in

  X21:

  6.28 in

• Rear camera layout

  iPhone 3G:

  Single

  X21:

  Dual

• Depth

  X21: 4.9 mm thinner

  iPhone 3G:

  12.3 mm

  X21:

  7.4 mm

• Height

  iPhone 3G: 39 mm shorter

  iPhone 3G:

  115.5 mm

  X21:

  154.5 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. iPhone 3G

   Height:

   115.5 mm

   Width:

   62.1 mm

   Depth:

   12.3 mm +4.9 mm versus X21

2. 2. X21

   Height:

   154.5 mm +39 mm versus iPhone 3G

   Width:

   74.8 mm +12.7 mm versus iPhone 3G

   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. iPhone 3G

   Screen diagonal:

   3.5 in

   Aspect ratio (height:width):

   3:2

   Approximate rectangular screen area:

   36.5 cm²

2. 2. X21

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

X21 has approximately 169.9% more rectangular screen area than iPhone 3G.

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.

At least two unambiguous positive capacity values are needed for a chart. Original entries remain in the specifications.

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.