Apple Watch Series 4’s incredible ability to offer electrocardiograms (ECG) is one of the biggest reasons to upgrade this year. But you can’t use it yet.
Those in the U.S. will be able to get their hands on the feature before the end of 2018, but for those in other countries, the wait could be a lot longer. If you live in the U.K., you may even have to wait “years,” one report warns.