Switch from env3 to droid 1st gen with same or no data plan?

I have the $10 data plan on my env3 with verizon. My friend sold me his old droid, is there a way that I can just transfer my data to the droid with the same data plan, or just use the phone for talk/text and upgrade to a data plan later? The firmware on my env has been acting up and I was able to get the droid dirt cheap. Its a great phone and Id like to be able to use it.