As early as 2017, Qualcomm filed a lawsuit against the US International Trade Commission (ITC), accusing Apple of infringing Qualcomm's six patents. Qualcomm had hoped to ban imports of some iPhone and iPad models using Intel modems, but it turns out that the company has been wasting time and money.
As outlined by FOSS Patents, a well-known US patent site, Apple said in a recent filing with ITC that the company has bypassed a key patent in the complaint through the iOS 12.1 update, US Patent No. 9535490. The patent covers "energy-saving technologies for computing devices."
Apple said they have made changes in the iOS 12.1 update to ensure that there is no infringement of patent No. 9535490, but the company claims that the original design did not infringe. Qualcomm CTO has stated that an alternative design can circumvent patent No. 9535490. Apple submitted evidence in ITC's complaint that the patent No. 9535490 should not be valid.
Qualcomm has given up three of the six lawsuit patents. The administrative judge in the case said that Apple did not infringe on two other patents, and the last one, Apple has successfully bypassed the iOS 12.1 update. Therefore, Qualcomm is unlikely to win, even if it wins, it will not cover the iPhone with iOS 12.1 software upgrade. Apple and Qualcomm's ITC lawsuit will be heard in April.