Where can I find saved WiFi AP passwords? I have a WiFi modem and somehow misplaced the password, but my phone is able to connect to it since the password is already save, but clicking on show password dosen't work.
How can I find the password from my phone?
First of all you will need root acess. 

Now download any root explorer app and navigate to:

data/misc/wifi/wpa_supplicant.conf


Within the file you will find saved passwords.