It&#x27;s interesting that the article doesn&#x27;t address this, but the reason I think that relying only on cellphones without a landline is risky has to do with emergency situations, and for some reason I thought the CDC would tie into that, but maybe I&#x27;ve just been watching too much of the walking dead.<p>In the case of a cellphone-only household, it&#x27;s really easy to think of a time when all of the cellphone holders are not present, so that there&#x27;s no real contact into or out of the house, potentially with people present. In the case of a 911 situation like someone choking or having a heart attack (or a fire) that could come down to going up and down the street knocking on a neighbor&#x27;s door, or jumping in a sedan to race to the hospital.<p>I also wonder how accurate geo-location would be for 911 calls, where it&#x27;s very easy (I would hope) for 911 operators to know the exact street address of someone making an emergency call, even if they ask for the address as well.