Celkon Millennia Hero vs O2 Cosmo

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

  Millennia Hero: 17 g lighter

  Millennia Hero:

  113 g

  Cosmo:

  130 g

• Width

  Cosmo: 2 mm narrower

  Millennia Hero:

  64 mm

  Cosmo:

  62 mm

• Screen diagonal

  Cosmo: 1.6 in smaller diagonal

  Millennia Hero:

  4 in

  Cosmo:

  2.4 in

• Depth

  Millennia Hero: 2 mm thinner

  Millennia Hero:

  11 mm

  Cosmo:

  13 mm

• Height

  Cosmo: 14 mm shorter

  Millennia Hero:

  125 mm

  Cosmo:

  111 mm

• Release year

  Millennia Hero:

  2015

  Cosmo:

  2006

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. Millennia Hero

   Height:

   125 mm +14 mm versus Cosmo

   Width:

   64 mm +2 mm versus Cosmo

   Depth:

   11 mm

2. 2. Cosmo

   Height:

   111 mm

   Width:

   62 mm

   Depth:

   13 mm +2 mm versus Millennia Hero

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. Millennia Hero

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

2. 2. Cosmo

   Screen diagonal:

   2.4 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   17.8 cm²

Millennia Hero has approximately 155.3% more rectangular screen area than Cosmo.

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.