The plastic key fob is totally isolated from any network. If your phone was isolated like this you would need a new phone. Google Authenticator can be cloned if

The plastic key fob is totally isolated from any network. If your phone was isolated like this you would need a new phone. Google Authenticator can be cloned if you compromise the device. A plastic key fob that has no input is for all practical purposes impossible to clone and if it's stolen it can be easily revoked.