it's not free. it's charged to call the bank's customer service, and it's charged according to the local calling standard.

1. Calling customer service phone is a service phone for individuals, but for operators, it is a profit-making organization, so it will be charged.

2. Most banks belong to commercial banks. Calling customer service numbers is a way for banks to make profits, so there is also a charge for bank customer service numbers, such as 11, 119 and 12, which are national in nature, free of charge.