London's Court of Appeal has ruled that Apple Inc. must pay $502 million to Optis Cellular Technology for using Optis' 4G standard-essential patents in devices such as iPhones and iPads from 2013 to 2027. This decision overturns a 2023 High Court ruling and represents one of the largest patent damages awards in UK history, with total royalties and interest owed exceeding $700 million. Apple has expressed its intention to appeal the ruling, criticizing Optis' business model as focused solely on litigation. The case is part of a prolonged legal dispute between Apple and Optis over patent licensing fees.