How to enable COVID-19 contact tracing on your iPhone, and receive periodic exposure notifications

To activate COVID-19 contact tracing notifications on your iPhone, you'll need to enable it in your Settings app.

How to take your temperature on your iPhone by using a Kinsa smart thermometer

You can take your temperature using your iPhone by linking a smart thermometer like Kinsa's QuickCare and Smart Ear products.
Ars Technica

Enable/Disable Bluetooth on iPhone ... is there an easier way?

I'm pretty sure I know the answer to this question, and I'm pretty sure it's the disappointing one. On an un-jailbroken iPhone, is there an easier way to enable/disable the Bluetooth on an iPhone than ...
Macworld

How the iPhone’s Headphone Safety setting can affect a Bluetooth speaker

Apple wants you to avoid damaging your hearing when you’re using an iPhone or iPad (but, strangely, not a Mac). In Settings > Sounds & Haptics > Headphone Safety, enable Reduce Loud Audio, and you can ...