From this answer and comments on it, a PIN is used to encrypt the phone and it must be used to decrypt it. So what happens when a PIN is changed or even removed?
- Does changing the PIN necessarily decrypt the entire phone and encrypt again?
- If not, does the phone need to remember every PIN ever used?
- If a PIN is removed and the Slide to Unlock security measure is used, does the phone become decrypted? Or does it remain encrypted with the old PIN?