I don't. I also have a Lumia with WP7, and I do like the operating system quite much. What I do not like is the lack of updates and that the Lumia that I bought

I don't. I also have a Lumia with WP7, and I do like the operating system quite much. What I do not like is the lack of updates and that the Lumia that I bought relatively recently is now already obsolete. Coming from the iPhone, where I had years of updates, that's a few steps back.