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.
If you want to block your number permanently, you'll need to call your phone carrier's customer service department. A representative can block your phone number from the phone company office.When you want to unblock your phone number, you'll need to call your phone company again. If you want to block your number on a call-by-call basis, then press *67 on your telephone keypad.When you use the call blocking feature, you won't have any feedback that it works.o block your phone number when calling someone, you need to dial star 67 before you enter the number.