HTC U Ultra vs O2 XDA Atom

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

  XDA Atom: 30 g lighter

  U Ultra:

  170 g

  XDA Atom:

  140 g

• Width

  XDA Atom: 21.8 mm narrower

  U Ultra:

  79.8 mm

  XDA Atom:

  58 mm

• Screen diagonal

  XDA Atom: 3 in smaller diagonal

  U Ultra:

  5.7 in

  XDA Atom:

  2.7 in

• Depth

  U Ultra: 10.5 mm thinner

  U Ultra:

  8 mm

  XDA Atom:

  18.5 mm

• Height

  XDA Atom: 60.4 mm shorter

  U Ultra:

  162.4 mm

  XDA Atom:

  102 mm

• Release year

  U Ultra:

  2017

  XDA Atom:

  2005

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 +60.4 mm versus XDA Atom

   Width:

   79.8 mm +21.8 mm versus XDA Atom

   Depth:

   8 mm

2. 2. XDA Atom

   Height:

   102 mm

   Width:

   58 mm

   Depth:

   18.5 mm +10.5 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. XDA Atom

   Screen diagonal:

   2.7 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   22.6 cm²

U Ultra has approximately 296.7% more rectangular screen area than XDA Atom.

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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

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.