Google is reported to be preparing for a serious attempt to acquire wireless radio spectrum in the US.

The search giant is working on a plan to finance its bid in auctions scheduled for January and is said to be considering making a play without partners, using a combination of cash and borrowed money.

The company could be bidding to become an internet service provider itself. Or, more likely, it is concerned that the auctions may lead to a 'two-tier' internet, with charges attached to premium services. Google is keen to maintain competitive access to its online services.

The company has yet to declare its intentions ahead of the 3 December registration deadline set by the Federal Communications Commission.

The Mountain View company has previously suggested it might bid over $4.6bn (£2.09bn) for use of the wireless bandwidth.