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.
For example, to block incoming text messages from 416-999-2430, the message would read:  block 4169992430 . After the block was successful, the system will reply to let you know the number has been blocked. We do not currently have a way of blocking incoming texts on GSM devices.