"Apple Watch Blood Oxygen Monitoring Reinstated via Jailbreaking and Software Changes: CBP Ruling Expiry in 2028"
Jailbreaking an iPhone can re-enable blood oxygen measurement on an Apple Watch, revealing the ongoing court battle between Apple and health tech company Masimo. The feature was initially disabled despite the Apple Watch's capability to measure blood oxygen. Masimo accused Apple of stealing its technology, leading to a lawsuit and import ban on certain Apple Watch models. Despite the ban, Masimo demonstrated that the feature could be re-enabled using a jailbroken iPhone, but ultimately lost the argument. Apple has appealed the ruling, and even if it loses, it can re-enable the feature through a software update by August 2028 when Masimo's patent expires.