Perform an iCloud backup on your Apple device. For assistance, refer to How to back up your devices using iCloud or iTunes.
If not preinstalled, ensure the Samsung Smart Switch Mobile app has been installed on the new phone.
From the 'Bring your data to your new phone' screen, tap Receive data.
From the 'Get connected' screen, tap Wireless.
From the 'What's your old device?' screen, select iPhone/iPad.
Enter your Apple ID and password then tap Sign in.
If prompted, tap Allow on your Apple device, enter the provided verification code on your new phone then tap OK.
From the 'Choose what to import' screen, select the desired data to import then tap IMPORT.
If prompted to connect to Wi-Fi or transfer via cellular data, connect to a Wi-Fi network or tap OK.
Content transfer is completed in two stages; basic content is transferred first and larger files are transferred later.
Tap DONE to complete the transfer process.