That’s a bit simplistic. I don’t think it can generally be said that “the rabbaim have straight up said not to own” a filtered (or certainly a “schechted”) smartphone when it’s required for work.
For those who don’t know what a “schechted” phone is, it’s a smartphone (Android, AFAIK) which has had the browsers and app stores removed so that the only use of the internet is for email, banking, and GPS apps and the like.