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've received an unwanted text recently enough that it's still in your text history, you can easily block the sender. In the Messages app, select the text from the number you'd like to block. Select Contact, then Info.. Scroll to the bottom and select Block this Caller.. When your harasser sends you a text, it will display on their phone as having been delivered, but you won't receive it.