it's only when I turn on my speakerphone
[Re-Titled by Moderator]
Original Title: on my iPhone 13 when I turn on my speakerphone, On they say my phone sounds horrible like a robot to the point they hang up on me and say they were just text me
iPhone 13 Pro Max, iOS 18
Have you checked to make sure your microphone is working properly? If the microphones on your iPhone aren't working - Apple Support
If you make a call normally, without using the speaker does it sound alright to the people you are calling? Many times, interference will cause this, and it is also caused by the cellular provider if they experience interference.
iPhone 13 speakerphone sounds like a robot during calls
