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 to Block a Number on an Android Device. On Android phones, you can block any number from calling you. To do so, you first need to add the number to your list of contacts. You then have the option of diverting all calls from that number to your voicemail. Your phone will not ring when the number calls your Android phone.