AFAIK microsoft did not get any nokia patents with the buyout. As such nokia has left the market and samsung can no longer cross license with nokia, instead have to pay them and have to rethink their spending on frivolous microsoft patents.
In my opinion, keeping patents secret while saying someone is infridging one should be sued for libel or similar. If a company wants royalties from patents, they should say how much and from which patents. For a long time companies just say "they are infridging" and do not specify and are not called out on their bullshit. Top that with tons of obvious patents that should never have been granted. The system is fundamentally broken.