How do I reactivate my Clef account?

Reactivating your Clef account will link your new device with the Clef logins that you had previously linked on your old device. It will also create a new private key on your new device.

Install the Clef app on your phone.
Open the Clef app, and select the sign in here option (i.e., do not press the green "get started" button):

Enter the same email address you used on your previous Clef account, and press the activate this phone button.
Open your email and click on the verification link in the confirmation email. The Clef app will look like this while it is waiting for your email verification:

Finally, confirm your identity by entering the same PIN that you used for your previous Clef account: