Qualcomm has done a lot of things to squeeze Apple into giving in to its demands, from asking the Federal Trade Commission to ban all sales of iPhones in the U.S.to making the Chinese market inhospitable for the Cupertino firm.
According to Bloomberg, the new suit alleges that Apple refuses to allow Qualcomm to audit Apple's handling of the chipmaker's proprietary software, something the company says is in the current contract.
Next Qualcomm sues Apple, accusing them of failing to abide by their software license, and additionally of using their unprecedented access to Qualcomm to benefit rival Intel. Apple's decision about next year's products comes after the San Diego-based Qualcomm withheld software needed to test chips in prototypes, the Wall Street Journal reported.
Qualcomm also put the negative results down to another dispute with a licensee, who "underpaid royalties due in Q2 of fiscal 2017 and did not report or pay royalties due in Q3 and Q4".
The move is the latest in a long running battle. It's hard not to see the suit as a last-ditch attempt by Qualcomm to recoup potential future losses if Apple decides to use other competitor's chipsets in upcoming iOS devices.
Apple sued Qualcomm in January 2017 for almost $1 billion, claiming that Qualcomm had "unfairly insisted on charging royalties for technologies they have nothing to do with".
In July Intel filed a statement with ITC claiming Qualcomm is trying to Force them out of the modem business with Apple.
Perhaps not coincidentally, Qualcomm's lawsuit follows hot on the heels of a report that Apple is considering to drop its modems entirely.
However, Apple has now cut off those payments, costing Qualcomm an estimated $2 billion a year in revenue.