I can pair devices successfully and even transfer files back and forth using "send over Bluetooth" feature.
What i cannot do is to answer calls using headphones with microphone, plugged into notebook.
I had that working with my previous HP notebook, with BroadCom BT chip, so it hardly a phone issue.
Also i could play music on my mobile and it was playing over BT to HP notebook headphones too.
I suspect that it is a hardware or drivers issue or lack of feature of built into notebook Intel's BT adapter, but i need a confirmation or help to get it working.
Before you suggest that, i did look into "Services" tab of Phone's properties, and there is COM-ports only.
When i check it on the previous notebook, there is much more services like ".. Audio gateway" and some similar.
I have freshly installed Windows 10 (Clean install) and recent Intel's BT driver. I've also tried with MS installed stock driver and with MSI provided driver - no difference.
BT Model: Intel(R) Dual Band Wireless-AC 3165
Driver Version: Intel(R) Wireless Bluetooth(R) , 19.00.1621.3340
Windows 10 Pro, up-to-date.
Your description suggests an issue with the Bluetooth* profiles. Since you are able to pair and transfer files using Bluetooth*, and you are already using the latest driver.
You can check a list of the Features for Intel® PROSet/Wireless Software for Bluetooth® Technology in the following link:
As noted in the advisory, the Hands-Free Profile (HFP) and Headset Profile (HSP) are supported in Audio Gateway role (Server mode). This is the device that is the input and output gateway of the audio. In you configuration, the gateway/server is the Mobile phone, and you need the PC to behave as client. This feature is not provided by the driver.
It is worth to mention that Windows 8* and later support audio profiles natively. Interaction with media players and VoIP software is out of scope for Intel® PROSet/Wireless Software for Bluetooth® Technology from Windows 8 onwards.
Also, the Computer Manufacturer (OEM) may modify the hardware or software when they integrate the Intel® Wireless Adapters to their system. Some features may vary depending on the PC. We strongly advise you to check with the Computer Manufacturer Support about this as well:
Currently, there are no plans to do this, however, we will forward your feedback so it can be considered in the future.