Earphone cannot use on iphone 7 plus

Hello Syfiqv,

Thanks for reaching out to the Apple Support Communities! We understand you are experiencing some issues using headphones with your iPhone 7. We are happy to help provide some guidance on this.

You mentioned that the headphones work on a different iPhone, but no on your iPhone. That is a good isolation step to find where the issue is coming from. We have some great additional steps to check in the following article if headphones don't work with your iPhone:

If your headphones don't work with your iPhone, iPad, or iPod touch

If the issue continues after going over those steps, we would recommend reaching out to Apple Support directly using the link in the section "Still need help?" in the article above.

Best Regards.