Facebook has announced Home, an Android app that takes control of your phone, replaces the home screen with your Facebook newsfeed and relegates any competing social services to, it hopes, an afterthought.

At launch, Home will be available to at most 20% of Facebook’s mobile base. It is an interesting tool to lock in core users and drive up their engagement, but can only be part of Facebook’s mobile strategy.

Facebook has strong mobile user and revenue growth, but has not ‘won’ social on mobile as it has on the desktop, and competing services have drawn hundreds of millions of users. It is not yet clear Facebook will win, or even that there will be a single big winner.

The UK 4G spectrum auction raised a total of £2.3bn, broadly in line with similar auctions, although the highest quality spectrum raised less and the lowest quality spectrum raised more than might have been expected

The main short term consequences are as was expected beforehand; Vodafone and O2 will launch 4G services around May/June 2013 and H3G will launch in October 2013

Longer term, O2 and H3G may suffer from their lack of 2.6GHz spectrum, although with other bands likely to come free within the next ten years this may not affect them

Facebook’s announcement of Graph Search, the company’s first move into socially-powered search which now in beta trial in the US, leaves many details unanswered including full launch and monetisation plans. Reliance on user-generated content from Facebook friends limits the usefulness of Graph Search as a conventional search engine and hence its impact on Google and other web search businesses in the near term. In the longer term, Graph Search could become a powerful recommendation engine for certain categories like travel, but its dependence on user data and privacy restrictions are likely to limit its wider utility and revenue potential.