Hey , you want to change PIN (Personal Identification Number) number of your ATM card or debit card for the same to methods as :

If you don’t know your PIN:
Visit a financial center or call at 800.432.1000
(Mon-Fri 7 a.m.-10 p.m. or Sat-Sun 8 a.m.-5 p.m., excluding holidays) .
Make request for a PIN number .

PIN number will be mail .

If you do know your PIN:
Visit a Bank of America ATM .

Select More Options then Change PIN.

How to lock/unlock ATM card if it misplace :

If ATM card have misplaced card holder can temporarily lock the card from Mobile Banking app. or
Through Online Banking to help prevent unauthorized purchases and withdrawals.

What should to do if debit card is lost or stolen:

Notify bank immediately by signing in to Online Banking and requesting a replacement card.

Card holder can also sign in to the Bank of America Mobile Banking app.
Select the menu icon.
Select Help & Support
Then select Replace Debit or Credit Cards
or
Contact by call : 800.432.1000 (Mon.-Fri. 7 a.m.-10 p.m. or Sat.-Sun. 8 a.m.- 5 p.m., excluding holidays; outside the U.S. call us collect at 315.424.4022). and make request to block the card and issue new card.