All of the sudden people can't hear me on the phone, but I can hear them?

[iMore Question]

all of the sudden people can't hear me on the phone, but I can hear them

in the middle of a conversation, person was not able to hear me, but I could hear them.
I called them back with the same problem

 

[Just_Me_D]

Re: all of the sudden people can't hear me on the phone, but I can hear them

It appears as if you might be accidentally pressing the mute option on the call screen.