I want to change the battery after sale, but I don't know how to make an appointment.

First, we log in to official website, go to the homepage of official website, drop the homepage to the bottom, and then click the "Genius Bar" button.

After that, a brand-new webpage will pop up, and we will also pull this webpage down to the bottom, and then click the "Reservation" button of the genius bar on the left.

After that, a dialog box will pop up, in which we select our city and the nearest "Apple Store Retail Store", and then click "Next".

Then we will enter the page of "Booking Genius Bar Service", enter our Apple ID account and password here, and then press Enter on the keyboard.

After that, you will enter the genius bar service page of the Apple Store retail store where XXX is reserved, and select the Apple mobile phone icon here.

After that, we will enter the booking operation page. The first step requires us to send the letter displayed on the webpage to the XXX account through the mobile phone (it will be displayed on the account webpage). After successful sending, SMS will receive a registration code.

Then we enter our mobile phone number and the registration code received in the first step in the second step of the webpage.

Then enter the letters displayed on the webpage accurately in the third column of the webpage. If the letters are not clear, we can click the "Change Picture" button next to it.

Then enter your name and ID number in the fourth column of the webpage, and click the "Continue" button after it is correct.

Then another webpage will pop up. In the new webpage, we select the time period for the appointment, and then click the "Confirm Appointment" button. After the appointment is successful, if the user wants to replace the battery in the mobile phone, the user can bring his limited ID card and mobile phone to the Apple Store retail store for replacement during the appointment period.