I dont know what happened, i used my cellphone this mornind and it was fine, but now, the cellphone wont

1-Make a sound whenever im trying to call someone(dialpad)
2-Speakerphone wont work, cant hear music
3-The receiver is dead, i cant hear and i dont know if people can hear me.
4-The phone rings, but thats about it

whats wrong? =[


--Fixed: Had to plug-in my headphones, play some music, then remove them

Yes, this is a known bug. Just plugin your headphones and use ipod, then remove headphones.