Have you ever been asked, or ever wondered, âIs refrigerant, especially R-134a, heavier than air?â. Just this week I was asked this very question. Thinking I knew the answer right away, I was able to contain my natural, blurt-it-out style of an answer, at least until now.
Add a Contact to the Blocked List. Block someone from calling or texting you one of two ways: 1  To block someone who has been added to your phone's Contacts, go to. 2  The All Contacts window will appear where you can scroll through names to then tap the name of the contact you'd like to block.
How is it possible that whenever you call someone it always gives you a busy tone? Is it the same as blocking someone's phone number? Answer Wiki. If you're calling the same number and always gives you a busy tone, the person you're calling is either blocked your number or forwarded your call to a busy line. You can tell if your call is blocked by someone by listening and timing. A very short and sometimes unheared ring followed by a busy tone means that person has blocked your number.