My new Iphone5 works great but every 3/4 days i receive or make a call and the other party os so distorted i need to clear the call and try again. This is nothing to do with signal level. When it occurs the effect is the same on internal earphone as it is with the speaker enabled. I have not get had chance to switch to an external blue tooth linked handsfree yet when it occurs. This would prove of it is an internal DSP problem or if it is the audio amp or audio transducers on the phone. I have not noticed this happen on the audio from any on-board apps. Anyone else had this one?