Creating a custom column to tag items from two separate tables

[Anonymous]

 Hi,

I am trying to create a column where I want to create a tag coming from two separate columns. I'm not really sure if the SWITCH function would fit my need. Hoping you could help me on this one. Here's the sample of my table:

From that table, I wanted to create a contactability column where I'm supposed to tag those that have a mobile and email into one. For the picture above, I wanted to tag it as NO EMAIL AND SMS given that the columns Mobile and Email contains NULL.