Using your post to justify my ramblings...
When I was 13, we had no cell phones, we had landlines, that were just called phones in my day. :crazy: Our phone was right next to our little tiny pantry, which I would get into for some privacy, and I got into lots and lots of trouble for absentmindedly picking many labels off of many cans while I was in that pantry talking on the phone.
Anyway, this kind of illustrates to me, once again, how difficult this case is. According to statements, there is no landline at BD's house; there is her cell phone and SA's cell phone. Money appears to be tight, and we have no idea what kind of plan BD's phone is, other than a 'disposable' type of phone. It could be pay by the minute or pay by the day, or whatever other options these phones have I'm not aware of. BD says she left her phone at home for the kids to use. It's not clear if it was that day, over the holidays, or if it was a regular daily occurence, even when the kids had school.
There have also been some unconfirmed reports over whether Hailey was even staying there leading up to her disappearance.
All this tells me is IDK if Hailey had regular access to a phone or not to be on it 'all the time' or not. If she normally didn't have a phone, she might have been so used to not talking to her friends on the phone she didn't bother much when she did have a phone. Without knowing where Hailey was for the month of December and without having access to whatever phones she would have been able to use for that month, it's hard, IMO, to make any reasonable assumptions on if that even comes into play.