Operation method
Open the phone, find QQ, click and enter, as shown in the figure
After entering, click your avatar to enter the next page, as shown in the figure.
After entering, click "Settings", as shown in the figure.
After entering, click "Mobile Number" to enter the next page, as shown in the figure.
After entering, click "Mobile Business Hall" to enter the next page, as shown in the figure.
After entering, you can see the available phone bill balance, as shown in the figure.