Sometimes the iPhone gets stuck and thinks it has regular earphones or ear buds attached even though you don’t. When this happens, a headphones icon will appear on the screen and you won’t hear any sound from the external speaker. Here are a few things to try to fix this issue.
Ensure the unit is unlocked while performing these steps.
– If you have a regular iPod headset, try attaching those to your iPhone and unplugging them several times.
– Plug and unplug your iPhone headset several times.
– A foreign object may be trapped in the connection. Try blowing into it or try canned air.
– Some users in the comments section have reported success by sucking on the headphone jack or using a hair dryer.
Read the comments section below for more suggestions.