In the bottom navigation bar, there is a blue button with a ‘+’ (plus) symbol. Tap it and you will see the options to Block or Allow different types of numbers.

If you want to block or allow any phone number tap the option ‘Phone number’ or the ‘plus’ symbol to the right of it. You will see a popup, enter a phone number or a name in the provided fields and choose ‘Block’ or ‘Allow’.

If you want to block or allow similar numbers tap the option ‘Similar numbers’ or the ‘plus’ symbol to the right of it. You will see a popup, enter a phone number in the provided field, choose the mask for this number and tap ‘Block’ or ‘Allow’.

If you want to block or allow a custom/wild card number tap the option ‘Custom/WildCards’ or the ‘plus’ symbol to the right of it. You will see a popup, enter a wildcard value in the provided field and choose ‘Block’ or ‘Allow’. You can use the tips for creating wildcards, they are shown under the field for entering a wildcard.

If you want to block or allow an area code tap the option ‘Area code’ or the ‘plus’ symbol to the right of it. You will see a popup, enter an area code in the provided field and choose ‘Block’ or ‘Allow’. Note, that you can only enter the area code from your country, but without a country code.