11:58 pm-12:24 am: it was near Walmart
This is consistent with earlier testimony from Bates's teenage daughter when she said Miles destroyed the mom's phone and threw it in the grass behind the Walmart.
12/29/17 at 7:34pm: incoming call at her home in Round Rock.
--outgoing call--location: near Post, TX (for reference, a quick google search shows Post, TX is about 300+ miles away from Round Rock)
7:01-11:45 pm: at or near their home in Round Rock
11:46 pm: starts moving
11:56 pm: north of Walmart
11:58-12:40 am: at or near Walmart
12:40-12:44 am: traveled more
12/30/17:
Now in Trinidad, CO
12/29/17:
6:46 pm: in New Braunfels
7:49 pm: at or near his home in Austin
8:26 pm: at or near HEB in Austin
He notes that this phone was (at a minimum) 20 miles away from the crime scene in Round Rock.
12/29/17:
7:11 pm: in Dripping Springs
He notes this is the only thing that showed up for this phone and says (at minimum) it is 30 miles away from the crime scene in Round Rock.