I divert my works landline number to my Xperia XZ2 when I leave the office at night, have done this for years. Over the last few weeks the calls aren't coming through. They come up as a missed call on my mobile. I've tryed having the divert taken off and re put on my work landline and tryed diverting calls to a different mobiles and that works. It's just my phone where the calls aren't ringing, just coming through as missed calls.
