I took delivery of my new Mazda 6 in November 2016 which had the new 2017 update and have been very disappointed with the Sat Nav.
From day one it would not recognise my iPhone Hot spot and kept downloading without success the software for the Navigation system with a 75% success rate, and the screen flickered as you drove along.
It was returned to the service department and was told a new computer board was required, this was before Christmas, the new board was fitted mid January.
At first I thought the problems were solved but no; still cant see easily the iPhone hot spot unless you await until the car software is fully loaded then start the hot spot, if you leave the car this must be repeated.
The screen flicker is corrected, the clock has displayed 00.00 rather than GPS time for some of the time(checked that the time was available on the GPS screen) and Navigation still keeps trying to load continuously at start up, and as a variation will suddenly reload for no particular reason.
A new problem has arisen as I pulled up at some traffic lights it warned about speed camera ahead not once but continuously until I moved on.
This is my third Mazda 6 but after this it is likely to be my last, my previous Mazda 6 had TomTom which was great and used radio data rather than the internet which was zero cost, not so the internet data use.
Talking to customer service I am told the iPhone 5S with 10 software is not an approved phone, I find it unbelievable as the iPhone must be in the top two of popular phones. Reading on the USA/Canada forums and Apple site this is a known problem and after paying £30K for the car I would expect better.