HTC J vs Microsoft Lumia 640 Dual SIM

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

  J:

  OLED

  Lumia 640 Dual SIM:

  LCD

• Weight

  J: 8 g lighter

  J:

  137 g

  Lumia 640 Dual SIM:

  145 g

• Width

  J: 6.2 mm narrower

  J:

  66 mm

  Lumia 640 Dual SIM:

  72.2 mm

• Screen diagonal

  J: 0.7 in smaller diagonal

  J:

  4.3 in

  Lumia 640 Dual SIM:

  5 in

• Depth

  Lumia 640 Dual SIM: 0.7 mm thinner

  J:

  9.5 mm

  Lumia 640 Dual SIM:

  8.8 mm

• Height

  J: 9.8 mm shorter

  J:

  131.5 mm

  Lumia 640 Dual SIM:

  141.3 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. J

   Height:

   131.5 mm

   Width:

   66 mm

   Depth:

   9.5 mm +0.7 mm versus Lumia 640 Dual SIM

2. 2. Lumia 640 Dual SIM

   Height:

   141.3 mm +9.8 mm versus J

   Width:

   72.2 mm +6.2 mm versus J

   Depth:

   8.8 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. J

   Screen diagonal:

   4.3 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   51 cm²

2. 2. Lumia 640 Dual SIM

   Screen diagonal:

   5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   68.9 cm²

Lumia 640 Dual SIM has approximately 35.2% more rectangular screen area than J.

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.