My Polar H10 HRM (Firmware updated) and for some reason the App (Either on my PC or My iPhone) does not seem to pick up the monitor on a consistent basis. Firstly it can take ages to detect and when does it then shows it has not signal! If I walk out of the room i can then pick up a signal but not always. Note I have two H10 and it happens on both (Also the on two different windows 10 PCs and Iphone8 - All fully up to date) and I had similar issues on another HRM device.
As a side note it connects to the Polar apps, TSS, The Phone itself. It can connect to a laptop, and also to Garmin 935 and Garmin 235 all in the room.
Is it possible to open a call?