why the earphone mode is On all the time and i can`t talk or listen any calls .

[AC Question]

the earplugs are not connected to my phone, a symbol of earphone appeared to the top left corner. As i received a phone call, the only way to talk and listen from caller is to turn the speaker phone ON.

 

[the tall guy]

Sounds like a problem with the earphone port. It thinks you have something connected when you don't. Take the phone to your local repair store, see if they can assist.