QMobile Noir Z12 vs Yezz Billy 4

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

  Billy 4: 38 g lighter

  Noir Z12:

  147 g

  Billy 4:

  109 g

• Width

  Billy 4: 10.2 mm narrower

  Noir Z12:

  74.6 mm

  Billy 4:

  64.4 mm

• Screen diagonal

  Billy 4: 1.5 in smaller diagonal

  Noir Z12:

  5.5 in

  Billy 4:

  4 in

• Chipset

  Noir Z12:

  Mediatek MT6753 (28 nm)

  Billy 4:

  Qualcomm MSM8212 Snapdragon 200 (28 nm)

• Depth

  Noir Z12: 3 mm thinner

  Noir Z12:

  6.9 mm

  Billy 4:

  9.9 mm

• Height

  Billy 4: 29.4 mm shorter

  Noir Z12:

  151.9 mm

  Billy 4:

  122.5 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. Noir Z12

   Height:

   151.9 mm +29.4 mm versus Billy 4

   Width:

   74.6 mm +10.2 mm versus Billy 4

   Depth:

   6.9 mm

2. 2. Billy 4

   Height:

   122.5 mm

   Width:

   64.4 mm

   Depth:

   9.9 mm +3 mm versus Noir Z12

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. Noir Z12

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

2. 2. Billy 4

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

Noir Z12 has approximately 83.1% more rectangular screen area than Billy 4.

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.