Nokia presentation 2 Lumia of Nokia meet several problems among which the classic characteristics. Very classic for this category of products as a touch-sensitive screen, a camera HD or a browser software. Regarding Lumia 920 : his excessive weight of 185g against 140g for Iphone and 133g for the Galaxy S3. What is missing in Lumia, they are applications innovative as Siri, S-Voice or navigation in 3D for example. Today,the catalog of applications of Windows Phone is very thin next to those of Android and of iOS. But the applications are the heart of the success, and they are lacking. Worse still, some apps successful disappear from Windows Blind. For example Mint, American Airlines, Bank of America, NBC and Pinterest are disappearing from the catalog. By choosing not to target this type of Microsoft consumer made a wrong strategy. We don’t take place on down from range exclusively when we represent only 2 % of the market with a OS which does not meet the needs of a consumer in top of the range. The os accumulated far too much delay and things that doesn’t go in the right direction to get back to market shares.  All Lumia has a system of geo-localization working all around the world without Internet connection. And which thus generate no additional cost abroad. But that, the consumers don’t know it necessarily The problem of Nokia is also its marketing. The manufacturer wouldn’t have enough or not correctly promoted his products. " In the United States, a key market, when we evoke the name of Nokia, the consumers think at once of 3310, but almost never Lumia. For them Nokia does not make smartphones ", explains Mrs Milanesi in (lemonde.fr) So that the strategy of Microsoft is not good. RECOMMENDATION: In order to focus the development of the Lumia, taking into account the challenges and opportunities, we can put into practice this recommendation: Applicable to a wider range of models with integrated and multimedia applications for different budget consumers: Indeed, this is the major cultural factor that can help Lumia again to meet customer needs. That’s why we propose that Nokia interrupts the cooperation with Microsoft and it will be better to join Android system of Google.