The UK's mobile operators have operated network level filtering for many years.
Some Chinese handset makers, Web companies, and mobile operators have gone a step further and built their own mobile operating systems, although success has been limited so far.
European mobile operators have suffered plummeting revenue for years.
Mobile operators have been pushing location-specific advertisements and coupons for years.
Mobile operators have battled television broadcasters, many of which are still partly or entirely state owned.
"However, the majority of mobile operators have yet to make a firm decision.
To compete in the auction, mobile operators have borrowed heavily, some from overseas.
A spokesman said: "Mobile operators have a strong incentive to keep prices competitive.
Another problem is that mobile operators have yet to work out how to deal with advertisers.
Mobile operators have generally opposed the controls, arguing that the market should determine price levels.
The four biggest mobile operators have been scaremongering with variations on this theme for years.
