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.
Add a contact or phone number to your blocked list. You can add someone to your blocked list from the Phone, FaceTime, Contacts, or Messages app: 1  Tap next to the contact or phone number that you want to block. 2  If you're in Messages, open the conversation and tap Details, then tap.3  Scroll to the bottom of the Info screen and tap Block this Caller. 4  Tap Block Contact.lock calls and block or filter messages on your iPhone, iPad, or iPod touch. If you don't want to get phone calls, FaceTime calls, or messages from a certain person, you can add them to your blocked list. You can also filter out iMessages from people who aren't saved in your contacts.