A few days back Microsoft has announced the Windows Phone 8 operating system officially and has also announced the Windows Phone 7.5 users are not going to get the Windows Phone 8 update, but instead of it they will get the Windows Phone 7.8 update.Windows Phone 7.8 has got many features of the Windows Phone 8 OS, but still it’s not like the original thing.Anyway, Microsoft’s Ben has recently given us a demo of the Windows Phone 7.8 operating system on the Nokia Lumia 900 and you can watch the demo video above, so watch carefully and know all the new things that you are going to get in the coming months.