TECNO Phantom 8 vs vivo Y31

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

  Y31: 48 g lighter

  Phantom 8:

  185 g

  Y31:

  137 g

• Width

  Y31: 10.7 mm narrower

  Phantom 8:

  79.5 mm

  Y31:

  68.8 mm

• Screen diagonal

  Y31: 1 in smaller diagonal

  Phantom 8:

  5.7 in

  Y31:

  4.7 in

• Chipset

  Phantom 8:

  Mediatek MT6757T Helio P25 (16 nm)

  Y31:

  Mediatek MT6580 (28 nm)

• Rear camera layout

  Phantom 8:

  Dual

  Y31:

  Single

• Depth

  Phantom 8: 0.5 mm thinner

  Phantom 8:

  7.9 mm

  Y31:

  8.4 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. Phantom 8

   Height:

   160 mm +22.8 mm versus Y31

   Width:

   79.5 mm +10.7 mm versus Y31

   Depth:

   7.9 mm

2. 2. Y31

   Height:

   137.2 mm

   Width:

   68.8 mm

   Depth:

   8.4 mm +0.5 mm versus Phantom 8

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. Phantom 8

   Screen diagonal:

   5.7 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   89.6 cm²

2. 2. Y31

   Screen diagonal:

   4.7 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   60.9 cm²

Phantom 8 has approximately 47.1% more rectangular screen area than Y31.

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.