But then there is the possibility of receiving TV channels on your phone by mistake if you're surfing for something else. The quality of service will suffer due to "borderline interference (wave resonance theory)". White space just does'nt seem practical.
Broadcasters use the ATSC standard for HDTV so its highly unlikely anyone with a White Space device is going to see a TV signal. And since nearly all spectrum below 2GHz is being used and not interfering with each other its clear hardware designers know how to mitigate adjacent channel interference.
While GPS hardware designers appear to have missed that memo, everyone else seems to be following the rules.
And FYI, even though the U.S. 2.4GHz ISM band is said to have 11 channels only three of those are non-overlapping. Despite this the 2.4GHz ISM band remains highly productive.
The FCC voted 5-0 last September to approve rules for white-space devices–officially kick starting the market. Ofcom, the U.K. regulator, recently approved the use of white-space devices, too. Ofcom predicts white space technology will come to market by 2013.
The FCC has started a 45-day trial on Sept. 19 (pdf) with the first of nine databases that will allow new devices using the white spaces to operate without interfering with existing broadcasters.” The trial started on September 19, 2011 and ends on November 2, 2011.