Facebook-only cell plans raise net neutrality concerns

How much would you -- or your teenager -- pay per month for a phone that can only access Facebook? A new phone plan being offered at Wal-Mart is promising just that, and it has some network neutrality advocates concerned.

The concern is that with only certain apps and services, white-listed (accepted senders) users of these plans are less likely to try competitors. For advocates of network neutrality, any kind of selective treatment raises a red flag. So-called "zero-rated" services -- in which the service pays for the data so users can access them for free -- are a source of consternation for net neutrality advocates.