After a few months respite from this problem, it is back. As per all the others, a Pro 12 Max. Highly embarrassing using this phone as a business phone, when all I can do is let my clients ring me, try to answer (they can never hear me, or me hear them), and then ring them back. This is a joke, and has been happening intermittently since I purchased the phone when it was first released. How about a proper acknowledgement from Apple that there is a problem with the phone and a real and lasting solution? Or, even better, a full refund? Many people are all be having the same problem. It is not as if it is isolated, or user error.