I wonder how much it costs to do the following -- let's backtrack.
We already know that US companies can design phones, like Apple.
OK so the next step is to figure out where to source the components -- and under the context of OP's article, that means which components can be sourced directly from the US, or from the EU (i.e. manufactured inside EU, not branded in EU but sourced elsewhere).
Once we can figure out which components are economically feasible to be manufactured in the US and EU with the tariff, we might be able to go from there and slowly expand the operation to the rest of the chain.
We already know that US companies can design phones, like Apple.
OK so the next step is to figure out where to source the components -- and under the context of OP's article, that means which components can be sourced directly from the US, or from the EU (i.e. manufactured inside EU, not branded in EU but sourced elsewhere).
Once we can figure out which components are economically feasible to be manufactured in the US and EU with the tariff, we might be able to go from there and slowly expand the operation to the rest of the chain.