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.
Block calls, numbers, and text messages. Getting tired of nagging calls or text messages? You can block unwanted numbers from a specific person or from telemarketers. You can also block text messages you no longer want to receive. Some devices, such as the Samsung Galaxy S5, let you block specific numbers. Visit the Phones page, select your device, and look for steps to block calls.