The bank will take the following measures to deal with the situation where the customer is unable to repay the debt:

1. Collection measures: The bank will collect the debt multiple times through various methods such as phone calls, text messages, etc. Remind customers to repay. They may increase the frequency of collections in the hope of prompting customers to repay.

2. Interest and late fees: The bank will charge interest and late fees after the payment is overdue according to the loan agreement. As the overdue period increases, these fees will gradually increase, making it more difficult for customers to repay.

3. Outsourced collection: If a customer is unable to repay the debt for a long time, the bank may entrust the debt to a third-party collection agency. These agencies will take more forceful measures to recover arrears, including door-to-door collection, legal procedures, etc.

4. Credit record affected: Overdue repayment will have a negative impact on the customer's credit record, which will affect the customer's interest rate and limit in future financial activities such as borrowing money and applying for credit cards.

To sum up, banks will collect arrears through various methods, charge overdue fees, and may entrust the arrears to third-party collection agencies. Customers' failure to repay their debts may result in damage to their credit history and affect future financial activities.

Extended information:

According to relevant laws and regulations in China, banks need to follow certain procedures and regulations when dealing with overdue customers. For example, banks are required to issue demand letters and customers have the right to demand documentation of relevant debts before taking enforcement action. In addition, banks are also required to comply with personal information protection laws and protect customers' privacy rights.

However, which specific measures a bank will take and when they are taken will be affected by various factors, such as the customer's credit history, the amount owed, bank policies, etc. As such, specific circumstances may vary depending on individual circumstances and customers are advised to contact their bank as early as possible to seek solutions and avoid further risks and consequences.