So many wrote about this before, but it has been a while, so maybe people have forgotten or doubted. I decided to import some Apple watches from the US to myself and friends and see if the ECG theory was heavily locked to the US.
In fact, it is. If you have an Apple Watch purchased in the United States, it will have the ECG feature enabled anywhere you use it or where it was activated.
Still disturbing me so few people know about this, and I'm Australia at least many people buy these watches from Apple without knowing they are buying a gimped device.
Fortunately, I bought a lot, and the rare few who actually know about this loss of function are quite happy to get the US version.
Most will never see this feature before the S5 at all. In Australia, Apple has not even submitted for approval.