As we all know, starting from the fourth generation, Apple Watch supports electrocardiogram (ECG) functionality in some regions. However, the locked versions actually have the hardware intact, and you just need a little trick to enable the ECG feature.
Solution A#
This method has not been tested!
Let's start with a simple method, so simple that it makes you doubt life.
You just need to take a trip to Shenzhen, find any port, connect to a Hong Kong carrier's roaming service, and you can activate the ECG feature.
Solution B#
This method requires iOS 13.4+, watchOS 6.2+
Tested with iPhone XR (iOS 14) + Apple Watch Series 6 (watchOS 7)
Considering the cost of Solution A is a bit high, and it's a bit difficult if you're not in Shenzhen. Here's a more complex but much lower-cost method.
- You need to connect to a stable Wi-Fi network.
- Open the versatile Taobao app, purchase an Apple ID that has ECG functionality enabled.
- Sign out of your Apple ID on your iPhone.
- Log in with the newly purchased Apple ID. If asked about Apple ID security, choose "Other Options" - "Do Not Upgrade" and do not merge data.
- Enable iCloud Health synchronization and disable all other sync options except for "Health."
- Open the "Health" app and check if the ECG feature is enabled. It should be turned on under normal circumstances.
- Sign out of the newly purchased Apple ID and log back in with your own Apple ID.
- Open the "Health" app and check if the ECG feature is enabled. If not, repeat the process.
As for the "ECG" app on the watch, it should appear automatically after a while. If you can't wait or it doesn't appear, simply reset the watch.