The White Lists are the oposite, once an whitelist is enabled only the users in this list ( usually family members, close friends and co-workers ) will be able to reach you, all the others will be blocked and the attempts will be shown in your history log.
Add any number to the blacklist or enable one of blocking options: "Private numbers", "Unknown numbers" or "All calls".
== Advantages ==
- Easy to use
- Low power and CPU consumption