People don't listen to me in phone calls, but my microphone works fine in apps. I wish you may able to fix my issue.

Hi there, amilafromgalle!
Thanks for reaching out to the Apple Support Communities! It sounds like you are having an issue with being heard on your phone calls and I am happy to help out! Take a look at this article to Get help with the microphones on your iPhone, iPad, and iPod touch. This article will give you the best steps to take to troubleshoot the issue along with steps to take if these steps do not resolve the issues you are having.
Take care!