Of the 3 candidate phones I had, 2 of them are near impossible to work with - we cannot install custom firmware on them. The other phone appears promising so far and we're continuing tests. It may take a week or so to know for sure though.
I'm doing what I can to avoid a phone shortage so for now we'll use the older phones, but with single cables only to reduce the RF issues. A single button may eliminate them, and we'll know in around a week. But that would still not be the permanent solution we're looking for.
