Bluetooth
The Bluetooth feature on my iPhone never works whenever I try to connect my phone by Bluetooth to anything. For example right now I’m trying to connect my phone to a Bluetooth speaker and nothing is happening.
iPhone 7
If the following support guides:
Pair a third-party Bluetooth accessory with your iPhone, iPad, or iPod touch - Apple Support
and/or: If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch - Apple Support
do not give you any improvements, have your device inspected at an Apple Store or Authorized Service Provider: Apple – Location Selector
Regards
Giulio