Cyanogenmod lets you blacklist any number with 2 or 3 button presses from call history. It's actually the main reason I switched to Cyanogen - turns out the pre

Cyanogenmod lets you blacklist any number with 2 or 3 button presses from call history. It's actually the main reason I switched to Cyanogen - turns out the previous owner of my new number very abruptly changed numbers because of debt collection calls. Those 5am calls, as well as a multitude of other annoying callers like payday loan companies, made it well worth the switch. Today I'm up to 21 blocked numbers. You can also whitelist just your contacts list, block area codes with wildcards, or block private numbers. http://www.androidpolice.com/2013/07/31/cyanogenmod-10-2-to-include-new-global-blacklist-to-block-calls-sms-or-both/ http://www.androidpolice.com/2013/07/31/cyanogenmod-10-2-to-... For stock Android I recall being able to add the numbers to a contact and make them go to voicemail, but that was an annoyingly unusable workaround. There may be better options these days.