ChrisJ4203 wrote:
.. However, if the person had an Apple Watch, it does have the ability for the wearer to make a phone call from the watch, so long as it is paired with a phone. ..
This is not necessarily correct.
Given the serious nature of the subject, it is worth clarifying why (but, for the same reason, also see the disclaimer below).
Once Apple Watch has been paired to an iPhone, it remains paired to that iPhone at all times (unless and until it is erased or unpaired). The watch remains paired, for example, even when that iPhone is turned off or out of Bluetooth range of the watch.
Apple Watch does not presently have cellular capabilities of its own. When using the watch to make calls via the cellular network, it requires an active connection with the paired iPhone. That connection can be via Bluetooth or via Wi-Fi (Apple Watch can connect to certain 2.4GHz Wi-Fi networks if the iPhone, whilst connected to the watch via Bluetooth, has connected to that network before).
If the watch is not connected to the iPhone via either Bluetooth or Wi-Fi (for example, because the iPhone has been turned off), all attempts to make calls via the cellular network will fail - even though the watch is still "paired" to the iPhone.
Also, under certain circumstances, Apple Watch may still be able to make phone calls even if the paired iPhone is not available via Bluetooth or Wi-Fi. This can apply if the iPhone is on a carrier plan that includes Wi-Fi calling, subject to Wi-Fi calling having been enabled and the watch being connected to a Wi-Fi network.
Note also that Apple advises: "You can use iPhone to make an emergency call in many locations, provided that cellular service is available, but you should not rely on it for emergencies".
Disclaimer: I believe the above information to be accurate at the time of writing, but users should check Apple's published guidelines independently and not place any reliance on the contents of this post. Behaviours described above may also change over time, including under different hardware and/or software versions.
More information:
https://www.apple.com/support/
About Bluetooth and Wi-Fi on Apple Watch - Apple Support