I hope we hear more details about this phone call soon, but not counting on it. Only a few logical possibilities, imo.
1. MW directly connected to family
MW knows Debbi, Jeremy or Debbi's dad and one of them called her, she answered, and she is not revealing this to the press (and may or may not have told LE). But then, why go on national tv and lie rather than stay silent? Kind of a stretch, imo.
2. MW connected to non-family intruder/kidnapper
MW knows the supposed intruder who took the phones and the baby and he/she called MW after stealing them. Again, quite a stretch that a kidnapper would call someone who could lead right back to him/her (not to mention electronic tracking), imo.
3. MW connected to a yet-identified visitor at the Irwin house
MW knows someone who was at the Irwin house that night, but is not a relative of Debbi, Jeremy or Debbi's dad. That person picked up a phone lying on the counter and called MW; she either lied and answered it, someone else answered her phone for some reason, or it went to voice mail and no message was left. Or, the visitor picked up a phone off the counter and tried to call a third party but punched in MW's number by mistake. Possible - but we are being led to believe that no one but Debbi and the kids were at the house after the neighbor left.
4. MW unwittingly connected; clueless
MW knows jack about any of this. She loaned her phone to someone who is somehow connected (or someone lifted her phone without her knowledge and returned it later without her knowledge). That person gave someone at the Irwin house MW's number to call if the need arose. It arose. MW didn't take the call, doesn't know if it was answered, doesn't know that she knows anybody connected to Lisa, and has told LE all she knows. Possible, but still a stretch.
5. MW - Right number, wrong owner (change in phone number)
MW has a phone number that used to belong to a contact of Jeremy or Debbi's dad. Most likely Jeremy. Debbi had access to Jeremy's phone that night and was snooping and dialing while she waited for Jeremy to get home from work. MW didn't have her phone on her at the time and really had no idea that any call had been placed to her number until LE showed up at her door and told her that a call had been successfully transmitted. She's stumped. Possible (kind of like the Vasco DeGama debacle).
Nothing seems like it makes much sense. The fact that MW had been through the neighborhood before with an ex-boyfriend makes it less likely it was a wrong number and that no one associated with MW knows anyone associated with Lisa. But, it's certainly possible that there is no connection at all and MW having gone through the neighborhood in the past is a coincidence. No matter why MW's number was dialed, someone was able to call out on phones that were not supposed to be able to call out. WTH? Because we now know that at least one of the phones worked, I suspect there are more calls from that night/morning that we haven't yet heard about.
ALL JMO and thinking out loud... Perplexed.