It is not possible to recover a password from a wallet. Or at least it shouldn't be possible.

If you have a mobile Wallet and want to crack the pin... that is easy do able with a brute froce bot/script.
I don't understand why they made the pin mandatory for the mobile wallet. All this does is that ppl will forget it and have to crack it after and because you can crack it it is entierly pointless to force user to have it. Who had this stupid idea!?