BlackBerry 7730 vs Lava Z91

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

  7730: 5 g lighter

  7730:

  142 g

  Z91:

  147 g

• Width

  Z91: 4.1 mm narrower

  7730:

  77 mm

  Z91:

  72.9 mm

• Screen diagonal

  7730: 2.7 in smaller diagonal

  7730:

  3 in

  Z91:

  5.7 in

• Depth

  Z91: 10.3 mm thinner

  7730:

  18 mm

  Z91:

  7.7 mm

• Height

  7730: 31 mm shorter

  7730:

  121 mm

  Z91:

  152 mm

• Release year

  7730:

  2004

  Z91:

  2018

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. 7730

   Height:

   121 mm

   Width:

   77 mm +4.1 mm versus Z91

   Depth:

   18 mm +10.3 mm versus Z91

2. 2. Z91

   Height:

   152 mm +31 mm versus 7730

   Width:

   72.9 mm

   Depth:

   7.7 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. 7730

   Screen diagonal:

   3 in

   Aspect ratio (height:width):

   1:1

   Approximate rectangular screen area:

   29 cm²

2. 2. Z91

   Screen diagonal:

   5.7 in

   Aspect ratio (height:width):

   18:9

   Approximate rectangular screen area:

   83.8 cm²

Z91 has approximately 188.8% more rectangular screen area than 7730.

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.