Apple found out how to accept friends' invitations.

1. On iPhone or iPad, open the Find application. You can search on the home screen and click the "Find" icon to open it.

2. In the search application, slide to the bottom, find and click the Add Friend option.

3. If a friend invites you to be his friend, you will see the invitation on the Add Friend page. Click on the invitation to view the details.

4. On the invitation details page, you will see the name and avatar of the inviter.

5. Click the "Accept" button to accept the friend invitation. Enter an AppleID password or authentication to confirm your identity and accept the invitation. Follow the on-screen prompts to complete the verification steps.

6. After accepting the friend invitation, you can return to the main interface of the search application and click the "My" option to view the friend list. In the friends list, you should be able to see the friends you just accepted.