This question already has an answer here:

I have a Samsung Galaxy rush that I would like to tether. I assume that it does not support wireless tethering, but it should do wired. Will I need to root the device? How would I do that?

marked as duplicate by Izzy, geffchang, roxan, ce4, t0mm13b May 26 '13 at 22:32

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.