Tech Police say don’t use *77 to block robocalls on your cellphone. You’ll reach 911 instead February 8, 2019February 8, 2019Jefferson Graham, USA TODAYComments Off on Police say don’t use *77 to block robocalls on your cellphone. You’ll reach 911 instead Mobile companies have maintained several alternatives, including #HELP, *77, #77 or *SP. But it's not the best way to connect with emergency help.