S8 android call blocking

[kevinky]

Trying to block all.phone calls and it keeps asking me for a passcode.. my phone passcode is 6 numbers the password requesting only allowing.me 4 characters 

. I am confused help

[AndrewL]

@kevinky: If you're being prompted to enter a code while activating Call Barring, please try entering '0000'. If this doesn't work, please reach out to your network provider directly to see if they're able to assist you with this. As a workaround, you can block all incoming calls via Settings > Connections > Flight Mode > On, or enable Do Not Disturb in Settings > Notifications. 

[kevinky]

Thank you, I had tried the 0000 but that wasnt recognised bit I will try the other routes thanks Andrew