How does Apple 4s delete the address book in batches?

Apple 4s batch delete address book method: install mobile QQ synchronization assistant and log in account, select address book sorting, then select empty address book, and click Delete completely.

The specific operation steps are as follows:

1. Install QQ Synchronization Assistant on your mobile phone, open and log in to your account.

2. If you haven't backed up your address book to the Internet before, you can back it up first, and then select the button in the upper right corner.

3. Select address book sorting.

4. Then select Clear Address Book and click Delete Completely.