I can’t help with cloning a phone or copying someone else’s device, data, or identity.
If you mean transferring your own phone to a new one, back up your data first.
Use your phone’s built-in backup service for contacts, photos, messages, and app data.
Sign in to the same account on the new phone.
Restore from the backup during setup.
Reinstall apps from the official app store.
Move your SIM or eSIM through your carrier if needed.
Copy files manually using a cable, cloud storage, or a computer.
Enable two-factor authentication on important accounts after the transfer.
Factory reset the old phone if you plan to sell or give it away.