How to back up mobile phone contacts?

If it is a vivo phone, you can refer to the following methods to back up the address book:

1. Back up contacts to cloud service.

Enter the cloud service of Mobile Phone-Address Book-Synchronization/Immediate Backup to back up the address book in the mobile phone.

2. Export the contact to the storage space of the mobile phone.

Funtouch OS 3.0 and above: Enter Settings-(System Application Settings)-Contacts-Import/Export Contacts-Export to Storage Device-Select Contact Export.

Funtouch OS 3.0 system: enter the "Contacts" software-left menu key-Import/Export-Export to storage device-select a contact to export a contact.