Disable Cellular radio but keep Data Connection?

Typo in Thread name i know....

I am currently using a Verizon Galaxy Nexus, but it's so expensive to keep up with the 100 dollar payment each month as a college student so I decided to take the plunge into Google Voice.

However, i would like a fail safe before switching, some way to disable my cellular network so i can't receive calls or texts, but still get 3G and 4G LTE because i need it when im not around WiFi for Google Voice.

I saw a couple posts about it, one referring to which...

Disable Cellular radio but keep Data Connection?

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