Call blocker android is a very good application made for secure people's privacy. Through this app you to block unknown caller and known numbers of anyone. There are several possibilities to block numbers either by the list of contacts, call logs list, SMS list, whitelist or manually.
You can block SMS spam from numbers that are not in the SMS list and block SMS from numbers that are not in the Contact list
Write the application data to an external file or load the application data from the external file also block all SMS (except SMS from numbers that are in the Whitelist.
#Managing the Blacklist – to block phone numbers.
#Managing the Whitelist – to exclude phone numbers from blocking.
#Reading the Contacts and SMS lists of your phone – to block phone numbers not included in these lists.
#Blocking of private/anonymous numbers. - Different ways of comparing blocked numbers (equality, by fragment, etc.).
#Recording of the Event log – the history of blocked calls and SMS (with saving the texts).
#Managing notifications about block events.
#Support for light and dark themes of the interface.
#Common functions of SMS-application – reading/writing/exchanging SMS messages.