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.
Call & Message Blocking allows you to designate and block up to 5 phone numbers from sending text, picture or video messages to you. You cannot block numbers that are within your account nor can you block non-10 digit numbers such as 911, 411 or #MIN (to check minutes used). Back to top.