How do I determine the version of Bluetooth my iPhone supports?
You can search for your iPhone's technical specifications page by model name (like &quot;iPhone SE&quot;) on the apple support site. However, make sure you know what generation you are interested in, if that's a thing with your model. I searched for &quot;iphone se technical specifications&quot; on both the support site and the main Apple site and one site gave me info on 1st gen SE, the other on 2nd gen SE (both labelled &quot;iPhone SE&quot;).
The resulting spec page has info about the Bluetooth version supported, so I suppose it is determined by the hardware and not on the iOS version.
UPDATE:
It seems you can find a spec page containing bluetooth information on https://everymac.com by searching for the model number &quot;MP8K2LL/A&quot; as well.