Possibly, but once again think about it. THEY PAID OUT $700 That is not a trivial sum of money. Not for something that you could theoretically go to the primary source for. KC. They wouldn't pay $700 because "oh no KC lost THAT sim card so couldn't remember the phone number!". They (or you or I, or any reasonable person) would only pay out that much to back check KC's story. They knew she was lying and were investigating around her lies. It is the only reasonable conclusion that can be drawn from that. Just as CA's bank statements show a patern of abuse by KC and an enabling by CA, up until it stopped. Immediately at which point Caylee is never heard from or seen again. Very very chilling. These simple paper printouts tell a much different more believable story of that family and of what happened to Caylee, far more clearly than all the wagging jaws of her family, and their constant lies.
Oh and to the above question. No LE would not have had to pay KC's phone bill to see the records. I suspect that LE had them in hand by the morning of the 16th. Probably within an hour of them making a call to the telco. This was an active missing child / "kidnapping" case. The telco would have erred on the side of giving LE whatever they wanted as quick as they could, and let any needed paperwork or judicial sign offs catch up in a day or two. YM probably had the records waiting for him on his desk when he got back from his little walk with KC at Universal. If he hadn't already seen them.
Yes, that's my point. They knew they'd never get the truth out of KC and to disprove all her lies they had to start with the phone records and the non existent calls to Zanny. $700 is not much considering it gave them the truth, documented on paper. She could not manipulate her way out of that.