A maybe obvious note to those trying to use iOS device as hotspot but thought I'd post it here for some who may have gotten caught out in this issue -
iOS devices stop advertising their SSID very quickly if there is no device connected
If you activate, then connect Tesla.. once you lock the door and the car sleeps it disconnects and the iOS device will stop advertising SSID
When Tesla wakes up, no SSID, no WiFi connection
So in order to "trick" the iOS hotspot to stay active.. you need a 3rd device ...
In my case I took a spare old iPhone, connected it to my iPad hotspot in the car.. started streaming some music on the iPhone..
Connected Tesla, locked doors and walked away
30min later I had the update
Guess I will do similar to pick up some map updates as well