> but not if the person that finds it opens up google authenticator (which shows the account the id is used for) and logs in to change the password before i hav

> but not if the person that finds it opens up google authenticator (which shows the account the id is used for) and logs in to change the password before i have a chance to. The person finding your phone would have to either have access to your password, your backup email address or the answer to your security question (which you can write yourself).