iPhone 7 Plus call speaker not working on iOS 15.8.4
I'm using an iPhone 7+ on ios 15.8.4 before I proceed. It's damaged and old but I can't afford a new one. As of today, whenever I call (using the phone app/directly from messages) it doesn't ring aloud and the speaker is gray as if I can't turn it on (Yes, I tried clicking it.) I've checked bluetooth and disabled it and it does nothing. Ringer is on and I've also tried it off. Other sounds WILL play, just not calls. I tried calling on Instagram and it let me call but I couldn't hear anything still. I've tried having others call me instead of me calling them, it still doesn't work. I don't know what to do. This is incredibly aggitating and I hate when phones stop working as well just because they're older.
[Re-Titled by Moderator]
Original Title: Call Issue
iPhone 7 Plus, iOS 15