AOL, Microsoft and Yahoo! are partnering to cross sell non-guaranteed display inventory in the US, highlighting their need for scale in the face of increasing competition from Google and Facebook

Aggregating unreserved ads via their respective networks may boost share of ad budgets, but the focus on less valuable inventory means any impact is likely to be small

Short of extending the partnership to include all inventory and greater investment in technology there seems little the three companies can do to stop further erosion of display share, though revenues should continue to rise

Carphone Warehouse’s H1 2011/12 results were overshadowed somewhat by the announcements that it is shutting down its UK ‘big box’ consumer electronics venture and selling its share in the Best Buy US handset business

Its actual core business operating performance was grim, with drops of 12% in volume and 4.5% in like-for-like revenue in the September quarter, with the slashing of prepay subsidies in the UK hitting volumes, and the late arrival of the iPhone 4S hitting revenue

With the iPhone 4S having now launched, H2 is likely to be much better, with like-for-like revenue returning to growth, and a focus on the core business will help in weathering the economic headwinds to come

Nokia has launched its comeback with two very solid Windows Phone devices at €420 and €270. Next year Nokia, like Apple, will have handsets with uniquely appealing industrial design. However, Nokia will not launch in the USA until 2012 and needs to add cheaper smartphones to the portfolio

Nokia and Microsoft face a hard struggle in establishing a third mobile app ecosystem. However, it is not impossible (Google has managed it in 18 months) and given more devices and the right execution they could manage it

2012 will be the critical year. We believe that the flaws in the Android proposition mean there remains a real window of opportunity. However, if Apple launches a cut-price iPhone then the market will be turned upside-down, again

In this report we outline the current state and likely development of the war between mobile platforms. We discuss installed bases and activity levels, the key issues facing Apple and Android, including Android fragmentation and Google's acquisition of Motorola, and go on to look at the tablet market and the outlook for RIM, Nokia and Windows Phone.

After strong underlying improvements in growth and profitability in 2010, in H1 2011 H3G Europe’s service revenue growth was steady at 3% and margins only slightly improved to (underlying) EBIT breakeven

In the UK, service revenue growth accelerated to 7% (from -1% in H2 2010), with EBIT maintained at about breakeven, as the UK company’s ongoing strong contract subscriber growth fed through

Italy suffered roughly the opposite fate, with service revenue growth falling to -8%, as its recent subscriber losses fed through, and EBIT remained firmly negative

CPW Europe had a weak first quarter, with like-for-like revenue growth of -3.3%, with all of the drop coming from the 18 to 24 month contract length shift in the UK

We expect its performance to improve through the rest of its fiscal year, but it will need to in order to hit even the bottom end of its full year guidance

The US mobile retailing operation is doing much better, with very strong revenue growth, and is likely again to exceed full year guidance

The most dramatic observation from our survey is the surge in mobile data service usage: 48% of UK mobile users now use a data service at least once a month, up from just 30% last year. This increase is substantially all from the increased number of internet-centric smartphones (i.e. iPhone, BlackBerry and Android handsets) in the base

The internet-centric smartphones themselves had substantially no reduction in data usage penetration rates (all at 90%+) despite their volumes surging, with users from all age and socio-economic groups using them for data services. Data service usage penetration on a daily basis actually increased for Android and BlackBerry handsets

This supports our view that it is the nature of these handsets in terms of their ease-of-use for data services that is driving overall usage, and that overall data usage will continue to surge as they continue to diffuse through the subscriber base

CPW Europe had a difficult quarter, with volumes falling 9% and like-for-like revenue 2%, due to continued prepay weakness and the shift to 24 month contracts in the UK

The US business was again very strong, growing volumes at 26%, and this strength is likely to continue due to an acceleration in store roll outs

Keeping the European business flat in 2011/12 will be a challenge, but the US business is likely to more than make up for this at the group level

H3G Europe improved its revenue growth and margins in 2010, albeit not by as much as its headline figures claimed. It is currently growing at 5% with EBIT at around breakeven

Given that its parent company is likely to want to keep EBIT positive, it is likely to be constrained on future investment in subscriber growth, limiting its potential going forward

The UK was particularly strong, with dramatically improved contract subscriber growth, and margins improving despite this, driven by the completion of the T-Mobile network share implementation helping margins and the smartphone revolution playing to the company’s 3G network strengths

CPW’s European volume and revenue growth dropped in the December quarter, but this was largely due to the higher mix of prepay in the Christmas period, with underlying trends (strong contract, weak prepay) unchanged

US volume growth surged to 34% as the company continued to roll out standalone stores in malls and shopping centres, and there appears to be plenty of growth to come

Looking forward, the UK business is likely to suffer from the longer handset contracts that have been rolled out by the UK mobile operators over the last two years, but continued strength in the US is likely to more than make up for this