I have a 21 & received 3.5.4 a couple of days ago. The truck has been hooked up to my home wifi for some time. I also do not have a cellular plan for the truck.Word on the f150gen14 forums is that they push out over cellular. Same way your ford pass works. If you get a low battery warnings, chances are the install attempt has occured
Now getting Android Auto full screen w/ AA ver. 8.7.630224 on a Samsung Note 20.
Is it possible for Ford to push these updates via cellular without a cellular plan or update via your phones data plan?