The title saids it all. I have been an iPhone user for quite some time now and my current phone is a black iPhone 6 which I have purchased last year on launch date. Usually all the iPhones and all the softwares I have been using over the years Apple always impressed me and never had any problem or lag with any of the updates until iOS 9 came. I don't know about the new 6s, but iOS 9 has been making my phone glitchy, laggy, some things are not responsive right away. There are many small things but I don't want to get into detail. But I have never had a iOS software like this one and apple really needs to fix it. It's starting to become like an android phone to me which I do not like at all