HTC U Ultra 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.

• Display technology

  OLED versus LCD

  U Ultra:

  LCD

  Galaxy M21:

  OLED

• Weight

  U Ultra: 18 g lighter

  U Ultra:

  170 g

  Galaxy M21:

  188 g

• Width

  Galaxy M21: 4.7 mm narrower

  U Ultra:

  79.8 mm

  Galaxy M21:

  75.1 mm

• Screen diagonal

  U Ultra: 0.7 in smaller diagonal

  U Ultra:

  5.7 in

  Galaxy M21:

  6.4 in

• Chipset

  U Ultra:

  Qualcomm MSM8996 Snapdragon 821 (14 nm)

  Galaxy M21:

  Exynos 9611 (10nm)

• Rear camera layout

  U Ultra:

  Single

  Galaxy M21:

  Triple

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. U Ultra

   Height:

   162.4 mm +3.4 mm versus Galaxy M21

   Width:

   79.8 mm +4.7 mm versus Galaxy M21

   Depth:

   8 mm

2. 2. Galaxy M21

   Height:

   159 mm

   Width:

   75.1 mm

   Depth:

   8.9 mm +0.9 mm versus U Ultra

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. U Ultra

   Screen diagonal:

   5.7 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   89.6 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 12.3% more rectangular screen area than U Ultra.

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.