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.
This will ensure that the person receiving your call wonât be able to see your phone number and name. Note that when sending text messages your caller identification will not be hidden. Please also be aware that many smartphones have the functionality to block unknown numbers. If the person you are calling has enabled 'block unknown numbers' on their phone, you will not be able to call them. Some network carriers and countries do not allow you to hide your number. If you have followed all the below steps and your number is still showing, you should check with your mobile network if they allow this feature. 1. Tap Phone.