The old mobile phone companies, like Motorola, Nokia and Samsung, have lots of patents on phone and network technology. These patents are mostly standards-essential, meaning the patent holders have committed to licencing out to all comers, including Apple.
The new mobile phone company, Apple, has patents on computer technology relating to operating system, functionalities and applications. These patents are mostly private and unique to Apple, which licences them out in its sole discretion and on a commercial and strategic basis.
Obviously, the old mobile phone companies are endlessly p****d *ff by having to let Apple get THEIR phone and network patents, while Apple at the same time mostly refuses to licence out its private computer software patents.
Apple seeks to protect and preserve the uniqueness of its products, mostly related to private non-standards computer software patents.
Of course Apple needs to pay, you know, fair and reasonable fees to all holders of all patents for all standards-related phone and network technology. Not all of those fees have been agreed upon.
Apple in the big scheme of things is defending itself against unreasonable fees claims for standards related phone and network technology, while at the same time attacking others for stealing Apple's private and unique computer software technology.
The new device class of smart phone is a computer with phone capabilities. The old mobile phone companies have failed miserably to invent in this device class which Apple arguably created. The old mobile phone companies now have to rely on Google and Microsoft to do their inventing.