I want to sell my rev I and return to rev E

I want to sell my rev I actiontec router so can I sell it or when the rev e breaks down or something will they give me a rev I and expect me to provide a rev I or will they give me a rev e just making sure before I sell it. The reason I want to sell it is because the rev I can't charge my iphone so its useless. I want to use the actiontec to charge my iphone so I wanna return to my rev E and sell my rev I.