receive my Arris WBM760A modem from this seller . the unit work just fine . however , when the Comcast technician come out to install it , he say that the modem have be provision by another cable company and that while it may work , there be a chance that the unit would stop work if Charter -lrb- the other cable company -rrb- decide to re-provision it . in other word , this be use . I feel that this information should be clearly mark on the item description . I be not take any chance , this will be straight back for a return .