I have tried all this. My dads iPhone 6s had the same issue. The iPhone 8plus has the same issue as well. Random it calls a person in contact list when kept on table or in pocket.
None of these were the cause of the problem. This happened today. Phone randomly called my son in law with no prompt while I was looking at the screen. No call was made or indicated from my phone. He could hear everything. There was no call made. The phone opened up a one way connection all on its own.
@@m_nothing200 no fix, no record of calls except on my son in law’s incoming phone log. And everyone at T-Mobile acting so so shocked as of they never heard of this.