<p>My proctors, in every test I remember taking (SAT, AP, ACT) read from the script and did as instructed. My mom usually reminded me to leave my phone in the car/house, but for AP tests our teachers proctoring collected phones before the test in a basket. I had mine with me one day, it went off during the test! Everyone heard the basket vibrating and wondered whose it was-just a distraction completely. I felt bad, for having it AND for forgetting to silence it completely. </p>
<p>Very unfortunate for your son, but it appears both leaving the building and having his phone were not allowed.</p>