I have PTCL DSL, I want to change its password and wifi device name.
Check your PTCL Modem, on the backend of the device, there is an admin username and password.
first of all, you need to connect to your network using a wire or wifi modem and type this Address in you Any browser (Google Chrome)
Enter user name and password
after login, you can click on "Wireless"
in the wireless menu, there is sub-menu as "Security"
on Security page here is the option of "WPA/WAPI passphrase"
you can enter your new password here and click on the "Apply/Save" button
or to view the existing password you can click on "Click here to display".