BenQ P31 vs BLU J4

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.

• WeightP31: 8 g lighterP31: 150 g · J4: 158 g
• WidthP31: 20.3 mm narrowerP31: 52 mm · J4: 72.3 mm
• DepthJ4: 7 mm thinnerJ4: 10 mm · P31: 17 mm
• HeightP31: 33 mm shorterP31: 118 mm · J4: 151 mm
• Release year2004 / 2019P31: 2004 · J4: 2019

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. P31

   Height

   118 mm

   Width

   52 mm

   Depth

   17 mm+7 mm versus J4

   Weight

   150 g

2. 2. J4

   Height

   151 mm+33 mm versus P31

   Width

   72.3 mm+20.3 mm versus P31

   Depth

   10 mm

   Weight

   158 g

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.

At least two phones need compatible screen dimensions for a drawing.

1. 1. P31 Screen geometry unavailable or conflicting
2. 2. J4 5.5 in · 18:9 About 78.1 cm² rectangular area

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.