The method of repaying loan interest by mobile phone is as follows: 1. Open the rural credit cooperative app on the desktop of the mobile phone. 2. Next, click on the top right corner of the page. 3. Then, click Login. 4. After logging in, click the loan indicated by the arrow. 5. After entering the loan page, click Repay Now.

Settlement of loan interest of rural credit cooperatives in Guizhou Province: there are loan amount, loan term and loan interest rate, and the monthly repayment amount and total interest can be calculated according to the bank's interest rate table or online loan calculator.