Iphone 5S. Software version 11.1.1
Front Microphone while call - Not working
Speaker while call - Working
Speaker while Music - Not working
Headphone - Working in all condition
Seems phone stuck in 'Headphone' mode. There is no setting in any setting to comeout from this situation.
Tried setting > Airplane mode > On.. Leave phone for couple of min and turn Airplane mode Off.
Surprise. It started working..
I am not sure what happen.. Seems It's iOs 11 problem.