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.
iPhone. 1  1. Add the number you want to block to your Contacts. You can only select from your contacts list when blocking a number, so add the number that you want to block. 2  2. Open the Settings app. You can block calls directly from your iPhone, as long as your using an iPhone 4 or newer, running iOS 7 or later.