Generally speaking, data synchronization during device replacement is done through local WiFi sharing and does not usually involve the cloud.

However, with Android, especially modified Android, there are definitely more issues than with iOS.

For example, many apps have various permissions, and even the backups of different apps have their own cloud storage.

Taking private key backups as an example, the Binance wallet's non-private key wallet backup stores a portion of shards in the cloud, and a certain X wallet backup can also be stored in the cloud.

In any case, I prefer not to use the cloud if possible.

But if everyone wants to use iOS's cloud, remember to enable the "Advanced Data Protection" for iOS cloud.

Operation entry: Settings → Account → iCloud → Advanced Data Protection