These exist for most phones and provider. However, having read the terms of service on them, they pretty much collect a bunch of data about you for marketing pu

These exist for most phones and provider. However, having read the terms of service on them, they pretty much collect a bunch of data about you for marketing purposes, so it kind of defeats the point. They will, for example, collect the numbers of everyone who calls you. (They have to be able to do that in order to look up and block calls from known spammers.) No thanks.