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 don't have a smartphone, sometimes you can call your carrier and have them blacklist specific phone numbers. If you keep getting texts from new numbers, ignore them. When you reply to spam text messages they know they're reaching you and will keep trying. Your best defense other than blocking is to never reply.f you can/want to/do use Google Voice as your main phone number, you can block calls/texts and report them as spam. Google Voice gives you so many great options and so much control over how you use your phone that you don't get with your cellphone provider that it can really be worth the switch.