Does the Cat S48c work on all networks?

There are two versions of the Cat S48c for customers in the US. The Cat S48c for Sprint is optimised and works only on the Sprint mobile network, and the Cat S48c for Verizon is optimised for works on the Verizon network. The Cat S48c for Verizon can be used on other GSM networks such as AT&T and T-mobile, however we recommended considering one of our other Cat phones which are better optimised for these networks.