Question

what has 88 keys but cant open a single door​

Answer 1

Key board ↑↑↑↑↑↑↑↑↑↑↑↑↑ in mobile phone

A keyboard of a computer or a laptop has 88 keys but can't open a single door.

But in phone, generally in phone's keyboard, there are 94 keys, but it also can't open a single door.