Wear OS watches have been running on iOS for quite some time, but you do not have all the features you have when pairing devices with an Android phone – and that includes calls made and received.
With the help of a proprietary software update (so that this does not usually come from Wear OS smartwatches), the latest generation of Fossil 5 devices are now able to handle iPhone calls, reports 9to5Google. This means that you can answer an incoming call on an iPhone and make an outgoing call.
Because Fossil Gen 5 smartwatches do not have built-in LTE connectivity, you still need a connected phone to handle calls. To date, Fossil or Apple has not officially announced how the software works, but Reddit users have reported the new feature. If you have a Gen 5 watch, the required update should appear soon, if you have not already done so.
This calling feature is made possible by Fossil’s Gen 5 smartwatch built-in speaker – this speaker is one of the key enhancements you get over the Gen 4.