Filed under: CellphonesIn a wrap-up of the state of 4G networks over at BusinessWeek, the battle between the three competing 4G network standards -- WIMAX, Long Term Evolution (LTE), and Ultra Mobile Broadband (UMB) -- is appraised, with WIMAX clearly edging out its other rivals. This could be a two horse race before long if Verizon chooses to back GSM's successor LTE over CDMA's sequel, UMB. That would leave Qualcomm without one of its most significant backers for CDMA's spiritual sibling, although