IIf it was designed to spur more bidding in the 28 GHZ auction--it was--the FCC's move to boost the number of rounds per day from four to six and cut the bidding time from an hour to a half hour has worked. Since the change was made Monday morning (Jan. 7), the provisional winning bid (PWB) round-over-round increase has gone from $6,300 to six-figures over the past six rounds.  Following round 106, there were $691,846,550 in PWBs for 2,939 licenses. The FCC still has 133 licenses with no bids, but if they don't ever get a bid, the auction can still close since it has long ago topped its aggregate minimum for closing the auction, which was only about $40 million. There were 21 new bids in round 106 and, altogether, about $1.5 million more has been bid since the FCC went to more and shorter rounds, with about as much bid in the past six rounds as in the previous couple dozen. There are 40 qualified bidders competing for the 28 GHz spectrum, including Verizon, AT&T and T-Mobile, but none of the major cable operators eyeing wireless plays--though Cox is signed up for the 24 GHz auction that is to immediately follow the close of the 28 GHz auction.