I sound like a robot on the phone

Thanks for posting to the Apple Support Communities Enuno1307,

We understand you're having some issues with call quality. The following page offers steps specifically geared to resolving this type of behavior:

If the microphones on your iPhone aren't working

If the issue is that the caller is sounding distorted, this article can help:

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker

We hope you find this helpful!

Same problem. Doesn't happen every time but enough that people are hanging up on me thinking I'm pranking them. Just upgraded to a new Iphone 11. Never had this problem with the old one.