I spoke to someone I know for about 10-15 minutes (lets just say their name was Tom) and when I went to hang up, I noticed that at the top of the phone where it would just say "Tom", it actually said "Tom and 2 others", so Im assuming Tom tricked me into talking on a four-way call. I have the call saved on my phone, but is there any way for me to know or prove that I definitely was on a 3 or 4-way call? Please let me know. Thank you.