Apple is closing a pair of retail stores in east Texas, and opening a new one nearby to take on their traffic. But this has little to do with customer convenience; it’s likely all about patent lawsuits.

The move could easily save Apple millions of dollars.

“Coopetition” best describes the relationship between Apple and Qualcomm. Wireless modems made by Qualcomm are used in iPhones even as the two companies are locked in a years-long patent dispute over billions of dollars.

The fight reached a new phase today as Apple challenged four Qualcomm patents, arguing they shouldn’t have been awarded in the first place.

A small company that makes dual cameras for cellphones claims Apple is infringing on several of its patents. The Israeli startup says it showed Apple prototypes for a miniature telephone lens, and Apple used them to create its own.

According to Corephotonics, the iPhone X, iPhone 8 Plus, and iPhone 7 Plus all use technology for which it holds patents.

Claiming that Apple is infringing on several of its patents, Ericsson has ramped up its legal efforts against the company by expanding lawsuits to cover Germany, Britain and the Netherlands.

“Apple continues to profit from Ericsson’s technology without having a valid license in place,” said Kasim Alfalahi, chief intellectual property officer at Ericsson, adding that he is confident the courts will resolve the matter fairly.

Apple’s patent battle with Nokia might not be going to plan for Cupertino’s lawyers: staff of the International Trade Commission have reportedly told the judge in the case that Apple’s patent allegations are “unfounded.”

The case is being heard for the first time before Judge Charles Bullock today, but as Bloomberg reports, the third-party of the ITC does not feel Apple’s patents have merit.