Q: when I use the speaker on calls I can hear the other person but they cant hear me

Hi Dougcgolf,

Welcome to the Apple Support Communities! I'm sorry to hear you are having these issues with your iPhone. If you are having issues with people hearing you on speakerphone calls (but not on other calls), you may be having an issue with one or more of the microphones on your iPhone. If that is the case, you may find the information and troubleshooting steps outlined in the following article helpful:

Get help with the microphones on your iPhone, iPad, and iPod touch - Apple Support

Regards