Block number in fairphone 2

[fia]

How do I block a phonenumber?

[freibadschwimmer]

Please have a look at this thread, where this questions has already been discussed:

Is there a possibility to block numbers with FP2?

I use dual SIM: one for my private number, the other for my business number. On my business number, I receive spam calls every hour. Is there a possibility to block certain numbers – or better yet, numbers by regexp – on FP2?