This article explains how to use the OnePlus Clone Phone app (formerly OnePlus Switch) to transfer data from an old OnePlus device to a newer device.
How to Transfer Oneplus Clone from Old to New Phone 100% | Same Location All Data Apps Files Call Log Transfer
Whether you want to transfer your apps and data to a new OnePlus or another Android device, the OnePlus Clone Phone app lets you automate the entire process.
Download Clone Phone on both devices from the Google Play Store.
Open Clone Phone on your old device. The app will ask you to grant the necessary permissions. Follow the instructions to enable the correct settings.