Hi there jkm8033t,
From what we can tell, your iPhone is making phone calls unexpectedly without being prompted. We're glad you've joined us in Apple Support Communities, and we can provide some guidance.
To start, does this happen when your iPhone is locked or unlocked? Learn more here:
Wake and unlock iPhone
Next, have you noticed any other actions being taken on your iPhone without being prompted? For example, are apps opening unexpectedly or are items on the screen being selected without you tapping them? If so, work through the steps in this support article:
If the screen isn’t working on your iPhone or iPad
Also, you mentioned turning off Voice Control as a suggested troubleshooting step; did you get a chance to test to see if that helped? Learn more about using Voice Control from this link:
Use Voice Control on your iPhone, iPad, or iPod touch
If the information we've provided doesn't seem to help, please post some additional details about the issue. For example, have you noticed any trends with this behavior? Does it tend to happen with your iPhone in a specific location? We'll take a closer look from there.
Cheers.