Allview V3 Viper vs vivo X21i

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.

• Display technology

  OLED versus LCD

  V3 Viper:

  LCD

  X21i:

  OLED

• Weight

  V3 Viper: 15.4 g lighter

  V3 Viper:

  143.6 g

  X21i:

  159 g

• Width

  V3 Viper: 3.2 mm narrower

  V3 Viper:

  71.8 mm

  X21i:

  75 mm

• Screen diagonal

  V3 Viper: 0.78 in smaller diagonal

  V3 Viper:

  5.5 in

  X21i:

  6.28 in

• Chipset

  V3 Viper:

  Mediatek MT6737 (28 nm)

  X21i:

  Mediatek MT6771 Helio P60 (12 nm)

• Rear camera layout

  V3 Viper:

  Single

  X21i:

  Dual

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. V3 Viper

   Height:

   148.3 mm

   Width:

   71.8 mm

   Depth:

   8.1 mm +1.1 mm versus X21i

2. 2. X21i

   Height:

   154.4 mm +6.1 mm versus V3 Viper

   Width:

   75 mm +3.2 mm versus V3 Viper

   Depth:

   7 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. V3 Viper

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   18:9

   Approximate rectangular screen area:

   78.1 cm²

2. 2. X21i

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

X21i has approximately 26.1% more rectangular screen area than V3 Viper.

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.