I think Flores shows her that her phone did ping in Arizona and explained something about the towers and mountains? This is when she's rambling on about how she finally found her phone charger that was under the passengers seat, and she didn't know where she was with her poor sense of direction and ran out of gas and was "stranded" for several hours. She never says how she got gas in her tank in that story IIRC. No mention of anyone coming along with gas cans in their trunk to help her out.
So, how was she stranded for several hours when she had gas cans in her own trunk?