In this paper, we deal with multiplicity of solutions of a class of sublinear Schrodinger-Maxwell equations {-Delta u + V(x)u + phi u = f (x, u), in R-3, -Delta phi = u(2); lim(vertical bar x vertical bar ->infinity) phi(x) = 0, in R-3. Under more relaxed assumptions on V and f, we establish some existence criteria to guarantee that the above problem has at least one or infinitely many nontrivial solutions by using the genus properties in critical theory. (C) 2013 Elsevier Inc. All rights reserved.