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.
Unblock messages from a number. To allow incoming text or picture messages (SMS or MMS) from a number you blocked, follow these steps: Using a text or picture message from the blocked number. 1  From any Home screen, tap Messaging. 2  Touch and hold on the conversation thread from the number you want to block.