Why does it say line busy when I call someone?

[@amitdebbarma6117]

Minde one same if i call to someone it came line busy

[@griotsnaga8770]

How to call someone who blocked your number?

[@TechWHYS]

*💬 Do you have questions? Make a comment below, e.g.:*
“QUESTION: What was ruined because it became popular?”

[@amitdebbarma6117]

Means is if i call to someone it came like yuor i call is busy