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.
1 If you want to make an unblocked call after setting up a block on all your outgoing calls, you will need to enter the unblocking prefix before the phone number.  Hide your number through your device's settings. Many phones allow you to block your Caller ID information by changing the phone's settings. If your phone does not have the option to do this, then it is not allowed by your carrier, and you will have to try one of the previous steps.