The volume buttons on your iPhone can get broken fairly easily. If you drop your iPhone on it’s side, the buttons can get damaged and internal components of your iPhone can break. Sometimes gunk, lint, or other debris can get underneath the buttons and cause them to jam as well.
Without the volume buttons, you won’t be able to adjust the volume of audio on your iPhone, adjust the ringer volume, or use them to take photos. There are a number of reputable iPhone volume button repair services that can fix broken buttons, and we recommend that you explore your options as soon as you can.