When the phone is ringing for an inbound wireless call, after swiping the answer slide button the phone stops ringing. But it seems to take up to 3 - 4 seconds before the upstream channel is established and the calling party can hear me speaking. The calling party continues to hear ring tones until the 3- 4 seconds has passed. I am able to reproduce this problem by calling my iPhone from my home landline. This issue seemed to start around the time that the last point release to iOS 8 was released and was not an issue earlier in the year. I have upgraded to both iOS 9.0 and iOS 9.0.1, but the problem persists. Anybody else having this problem?