Get AT&T Mobility to lower their prices

So here is the deal:  AT&T Mobility charges $299.99 for the base Unlimited Family Plan, and $99 for each additional line.  Other companies are charging exponentially less.  For instance, SunCom charges only $99 for the first two Unlimited Family Plan lines.  T-Mobile offers an Unlimited Family Plan for $149.98 a month and $49.99 for each additional line.  Sprint offers an Unlimited Plan for $99, but it is not a Family Plan.  Each of these companies offers unlimited voice text or more in some cases, while AT&T offers only unlimited voice.  This is outrageous.  The only way that we the consumers can fix this problem is to constantly complain.  I encourage every person that has AT&T to call daily and complain about these prices.