As you are looking for helpline number of Bank of America for Trail of Credit Card, so here I am providing all contact numbers related to Credit Card:

CALL
Credit Card Customer Service
(including lost or stolen card)
1.800.732.9194
24/7

International Collect
1.757.677.4701
(international cell phone roaming charges may apply)
24/7

Credit Card Activation
1.800.276.9939
24/7

TTY/TDD
1.800.222.7365

Write
Credit Card Payments
Bank of America
PO Box 15019
Wilmington, DE 19886-5019

Express Overnight Service
Payment Services
900 Samoset Drive
DE5-023-03-02
Newark, DE 19713-6000

Questions about types of cards offered
Bank of America
PO Box 53132
Phoenix, AZ 85027-3132

Application status inquires
Bank of America
PO Box 2493
Norfolk, VA 23501-2493

Other credit card questions
Bank of America
PO Box 982234
El Paso, TX 79998-2234