Windows Phone is a treat in terms of user interface and it runs great without grip, remains to be seen over the long term. The gray / yellow model provides a "toy" effect to all (the neon yellow neon ... bah is) but it has the merit of proposing different colors with white and black traditional.
The black dot is the management of memory, can not install apps on the micro sd, one finds herself having to remove apps if one has installed Here Drive (Nokia Drive) with 350 MB maps to download.
Hopefully this is corrected during a next release jou