Celkon Q405 vs Samsung Galaxy M21

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

  Q405: 51 g lighter

  Q405:

  137 g

  Galaxy M21:

  188 g

• Width

  Q405: 10.9 mm narrower

  Q405:

  64.2 mm

  Galaxy M21:

  75.1 mm

• Screen diagonal

  Q405: 2.4 in smaller diagonal

  Q405:

  4 in

  Galaxy M21:

  6.4 in

• Chipset

  Q405:

  Spreadtrum 7731

  Galaxy M21:

  Exynos 9611 (10nm)

• Rear camera layout

  Q405:

  Single

  Galaxy M21:

  Triple

• Depth

  Galaxy M21: 1 mm thinner

  Q405:

  9.9 mm

  Galaxy M21:

  8.9 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. Q405

   Height:

   124 mm

   Width:

   64.2 mm

   Depth:

   9.9 mm +1 mm versus Galaxy M21

2. 2. Galaxy M21

   Height:

   159 mm +35 mm versus Q405

   Width:

   75.1 mm +10.9 mm versus Q405

   Depth:

   8.9 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. Q405

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

2. 2. Galaxy M21

   Screen diagonal:

   6.4 in

   Aspect ratio (height:width):

   19.5:9

   Approximate rectangular screen area:

   100.5 cm²

Galaxy M21 has approximately 120.8% more rectangular screen area than Q405.

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.