This is my third straight iPhone that calls my contacts on its own, usually voice only but sometimes by Facetime as well. (I never intentionally make Facetime calls.) I've learned through experience that unless I shut down and reboot my phone every time I initiate a call, the phone will call someone within minutes after I disconnect. It usually calls someone I just called or who I at least talked to recently, but not always. Having researched this problem many times, I believe I've turned off every function that could accidentally trigger a call, including Siri voice command. Nothing has helped. An Apple tech told me he thinks it could be a Verizon problem rather than a hardware issue. In any event, this is a maddening and often embarrassing issue. Can anyone help?