Installing the watchOS 5.2.1 update might be on your to do list. Apple just released iOS 12.3 and with it watchOS 5.2.1 arrived. You can start preparing now. If you haven’t completed these important steps, you should hold off on upgrading your Apple Watch. This is a lengthy process and one you can’t step back from.
WatchOS 5 brought a lot of important features and watchOS 5.2.1 adds in ECG and irregular heartbeat rhythm detection in Croatia, Czech Republic, Iceland, Poland and Slovakia as well as issues with the Explorer watch face.
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https://www.gottabemobile.com/6-things-to-do-before-installing-watchos-5/
