Is there a charge for oppo cloud service activation?

No charge. What can the official cloud service do for you?

1) The official mobile cloud service provides you with 5G cloud hosting for free.

2) With the backup function of cloud service, data such as SMS, call records, settings, application list and layout can be stored in the cloud, and the existing backup data can also be restored to the mobile phone to prevent the loss of mobile phone data.

3) Use the cloud service synchronization function to securely store your photos, videos, contacts, notes and other data, and synchronize them to the cloud service cloud.heytap.com in official website and other cloud service-enabled devices in real time, which is convenient for you to manage data quickly.

Different versions of ColorOS may be backed up in different ways. Please judge the system version of your device first. Go to Settings > About Phone > ColorOS Version to check the system version, and then you can back up and restore the data according to the corresponding scheme.

This answer applies to all OPPO models.