i dont know why but if i put my phone on vibrate or 1 beep  and try to make a call it makes the cll from speaker phone  and if i remove it from vib or 1 beep it still calls from speaker  . and when making the call i unlock the phone hit speaker on  and then hit speaker off and it will go to  back to normal but next call its back on speaker phone  unless i turn my phone off  and turn it on then its back to normal   this has been happening for the past 3 days now and its a used phone so i have no warranty