Aftershokz Headphones won’t work with phone calls

Hello Graueris,

Try unpairing your headphones then pair them back again:

Unpair:

To unpair a Bluetooth accessory, tap Settings > Bluetooth, find the device you want to unpair, and tap the info button , then Forget this Device. This will remove the accessory from the list of available Bluetooth devices.

Pairing:

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1. On your device, go to Settings > Bluetooth and turn on Bluetooth. Stay on this screen until you complete the steps to pair your accessory. 
2. Place your accessory in discovery mode and wait for it to appear on your device. If you don't see it or aren't sure how to make it discoverable, check the instructions that came with your accessory or contact the manufacturer.
3. To pair, tap your accessory name when it appears onscreen. You might need to enter the PIN or passcode. If you aren't sure what your PIN or passcode is, check the documentation for your accessory.

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Pair a third-party Bluetooth accessory with your iPhone, iPad, or iPod touch

Take care.