We all know "Avast!" means to stop! But, will Avast feature advanced Call/SMS blocking functionalities for stopping spam, unknown/private/hidden numbers, etc? Avast mobile security would be so much better if Avast can actually stop spam/unwanted calls. Avast Mobile Security should feature advanced call blocking functionalities such as a blacklist and a whitelist, which allow users to add numbers from their call log and contacts. Funtionalities such as "select all" and "delete all" buttons make it very convenient for adding loads of numbers to the blacklist/whitelist with a single tap! A "delete all" button makes it easy for deleting all blocked calls/messages in the log.