I have no specific knowledge at all of any cross-licensing here (and if I did, I surely won't comment on it in public), but from the few license deals I very ta

I have no specific knowledge at all of any cross-licensing here (and if I did, I surely won't comment on it in public), but from the few license deals I very tangentially know of, they happen in terms of portfolios of assets valid at a given time for a given period. That is, you get rights to portfolio X of N issued patents for M years, and I get rights to portfolio Y of P issued patents for Q years. We negotiate to assign some value to those portfolios, and if they don't even out, somebody pays the other a royalty. However, I cannot imagine anybody signing an eternal, all-encompassing cross-licensing deal to each others' portfolios. This is for many reasons, one simply being that one never knows what could be invented, and another being one simply doesn't know when the other will stop inventing and thus, reciprocating. Yes, Apple certainly has a cross-license deal in place with MS (in addition to the one from the 90s, given the number of UI features WP shares with iOS but has not been sued over). But I would be very surprised if this acquisition was included in those deals. Rather, the relevant cross-licenses were made when Apple settled with Nokia.