The trick is to use the old time number people used back in the day to call to set their clocks. Has always worked rather well for me. If I am on a website I always put in that number then wait for them to email they couldn't get a hold of my phone whereas I explained that a lot of websites are devious and will sell your phone to every organization they can think of. If I decide to do business with them then I will give them my phone number, but only to legit businesses like for car insurance for instance. Just use your area code and 4591212.