This problem isn’t exactly rare, and in most cases, it’s easily fixed. If this trick fixes the problem, and if this situation doesn’t happen with any regularity, chalk it up as a weird one-off and not something to worry about. To check these settings: Turning on Airplane Mode temporarily disconnects all networking on the phone, including disconnecting the phone from Wi-Fi networks and, most importantly, from Bluetooth devices. If Bluetooth is the culprit, cutting off the connection should solve your problem. Here’s what to do: If lint or other gunk has built up in the headphone jack and is tricking the iPhone into thinking something else is there: In that case, the headphone jack is the place the iPhone’s water-damage indicator appears on many models. For more recent models, it shows up in the SIM Card slot. For detailed instructions on where the water damage indicator appears on every iPhone model, Apple Support has everything you need. If you see the orange dot indicating water damage, you’ll need a repair to get your iPhone out of headphone mode. You can also try to save the phone from water damage.
