Same here, it's been 3 times attempted updates, but still won't complete the update, keep on installing. I placed a service appointment thinking it's only me having this issue, they came back and charging me to fix this issue, since it includes connectivity issue both WIFI and cellular network.
So I was thinking they can tweak my M3 onboard software then charge me to resolve the issue since I don't have a warranty anymore after 4 years.