LG Optimus Black (White version) vs Motorola FIRE XT311

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.

• Width

  FIRE XT311: 6 mm narrower

  Optimus Black (White version):

  64 mm

  FIRE XT311:

  58 mm

• Screen diagonal

  FIRE XT311: 1.2 in smaller diagonal

  Optimus Black (White version):

  4 in

  FIRE XT311:

  2.8 in

• Chipset

  Optimus Black (White version):

  TI OMAP 3630

  FIRE XT311:

  Qualcomm MSM7227-1 Snapdragon S1

• Depth

  Optimus Black (White version): 4.3 mm thinner

  Optimus Black (White version):

  9.2 mm

  FIRE XT311:

  13.5 mm

• Height

  FIRE XT311: 5.5 mm shorter

  Optimus Black (White version):

  122 mm

  FIRE XT311:

  116.5 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. Optimus Black (White version)

   Height:

   122 mm +5.5 mm versus FIRE XT311

   Width:

   64 mm +6 mm versus FIRE XT311

   Depth:

   9.2 mm

2. 2. FIRE XT311

   Height:

   116.5 mm

   Width:

   58 mm

   Depth:

   13.5 mm +4.3 mm versus Optimus Black (White version)

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. Optimus Black (White version)

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

2. 2. FIRE XT311

   Screen diagonal:

   2.8 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   24.3 cm²

Optimus Black (White version) has approximately 87.6% more rectangular screen area than FIRE XT311.

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.