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.
To learn more about the effects of blocking a contact, see this article. On iPhone, there are a few ways to block a contact: 1  To block a contact that is not stored in your phone's address book, go to the chat for that person, tap on the number for that person at the top of the chat, and then tap Block Contact. To block a contact that is stored in your phone's address book, go to WhatsApp Settings Account Privacy Blocked, then tap the Add New button. 2  When you receive an initial message from a contact that is not stored in your phone, and you want to block this contact, tap the Block button.