I'm having trouble entering numbers when on a phone call. For instance, if I call my bank or into a conference call I can't enter access codes quickly or with any accuracy. I have the headset plugged in but the numbers won't respond or Voiceover announces them unreliably. The numbers seem tow ork with all other apps but not on the phone once I enter a call. Is anyone having trouble with this? This seems to have just happened within the last day or so. Any help would be appreciated.