Amazon, Nokia and Apple are expected to announce new mobile devices in the next fortnight. We outline the main products and features expected and their implications

Around 125m smartphones were sold globally in Q2, up over 30% from Q2 2011. Around 450m mobile handsets were sold in the quarter, giving smartphones a volume share of around 28% Apple and Android dominate with a combined of 85% of units sold, and a cumulative total of 810m devices running their mobile platforms. Of these we estimate that 680m are active, of which 95m are tablets Android arrived later and has grown faster, but Apple’s market share of smartphones as been steady at 20-25% for several years: Android’s growth has come at the expense of Nokia, RIM and feature phones

Search remains the main engine for Google’s core business, but display is rising fast: we estimate display gross revenue will reach $9.2 billion in 2013, representing 16% of projected gross revenue (excluding Motorola)

Gross revenue from YouTube looks set to more than double to nearly $4 billion by 2013. Revenues from Google’s ad networks and platforms are also growing strongly, mainly to the benefit of publishers

We project Google’s net revenue from display next year will amount to $4.2 billion, equal to 10% of net revenue from its total advertising business

Apple sold 67m iPads through March 2012, and retains over 70% market share for premium tablets. Apple is aiming for the same long term dominance it enjoyed with the iPod, which maintained similar market share for a decade Microsoft and Google are taking radical steps to try to change this. Both are now making and selling their own hardware, while Google will sell a tablet at cost Microsoft and Google now have coherent tablet propositions, but they remain far behind on broader app ecosystems. Like Nokia, they are now back in the game, but they still have to play

Google+, the social network, has around 100 million users worldwide, although user growth appears to have stalled and usage is low on weak network effects

Facebook users, now 70% of the adult internet audience (excluding China), have no incentive to switch to Google+, starving the social network of vital momentum

Facebook is likely to dominate socially enhanced search, unless Google+ takes off, which seems unlikely

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

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.