God even hears the prayers of those who have received the inner call?

I wanted to ask you if God listens (and fulfills) also the prayers of those who have not received the interior call and therefore are not yet a Christian believer in all respects. Thank you.

The mere fact that a person is turning to God in prayer means that he believes in it, otherwise it wouldn't. God grants anyone who approaches Him with humility and faith, therefore it could be for that person the beginning of the path that would lead to conversion. It is precisely in moments of discouragement, indeed, that we get closer to God. I do not exclude that God also hears those people then. Then God works in a mysterious way that we cannot understand.