why can't I remove no. from blocked( black) list?

[Android Central Question]

I have accidentally added a contact no. to the black list on my Mate 9 and now can't remove it.I tried Contact-Hold-Remove from blocked list but it still blocked.When the person calls my phone does not ring in it goes to Voice Mail.
Can anyone help? thanks a lot

 

[Dano1200r]

Open the Phone, go to Settings, click on Block Call list, find your friends and press the red minus sign.