How to block unknown number

Solution
It depends. Some phones have in their phone dialer app the option to block unknown or blocked numbers in that apps settings. If yours does not, then there are many apps you can download that give this option. You can also check your online account with your carrier/service provider. Some have a place on the site where you can enter phone numbers you wish to block. However, please note, these numbers will still be able to leave you a voice mail.
It depends. Some phones have in their phone dialer app the option to block unknown or blocked numbers in that apps settings. If yours does not, then there are many apps you can download that give this option. You can also check your online account with your carrier/service provider. Some have a place on the site where you can enter phone numbers you wish to block. However, please note, these numbers will still be able to leave you a voice mail.
 
Solution