The next big issue for wireless is: developing a chip set that is interoperable with the different bands of spectrum and roaming agreements. A chip hasn't been developed yet to allow cross usage among all the carriers spectrum, only a say about 3 or 4 different frrequencies. The FCC is going to have to step in to get roaming agreements. AT&T and Verizon are fighting it, but Sprint, T-Mobile and the regionals need it.