Chosen Solution
My phone stuck on headphone.how can i fix it?
I’m thinking the headphone jack is busted. I think unplugging the charger port ribbon cable should stop the phone from routing the audio to the headphone jack. Follow this guide to unplug headphone jack cable: iPhone 6 Plus Lightning Connector and Headphone Jack Cable Replacement If it defaults back to the loudspeaker which is unplugged earphones then the headphone jack is probably faulty and the ‘iPhone 6 Plus Lightning Connector and Headphone Jack’ probably needs to be replaced. You can get the part from here: iPhone 6 Plus Lightning Connector and Headphone Jack
