MSFT has a bigger phone history, unluckily has become tinny smartphone player simply because of their mgmt slow secession on smartphone.
AAPL, RIMM are bigger smartphone player, more volume shipments, therefore, waits OPWV's bigger payday.
MSFT has longer phone history than RIMM/AAPL, therefore more than validates OPWV's suits against AAPL/RIMM, and don't forget even bigger pay day from Google or may be outright buyout by them.
Google might be getting special treatment maybe, due to early help and guidance to Openwave in this patent matter, or might have already agreed to have first option to buyout Openwave if they keep proving patent values.
Anyway you slice it, Openwave has enviable patent values in smartphone. That is being proven right now