How do you plan to hold these razor thin phones then? During last years I went from 9.3mm (iPhone 4S) in small formfactor to 8.9mm in 5.0" phone to recent 7.4mm in 5.5" phone. The last one even after almost a year of usage is insanely hard to hold and use naked. It is slippery (metal) and always tend to almost fall when I reach far corners or put it in the pocket. I bought spigen case entirely to have a better grip on this thing, not for the protection I don't really need. With thicker rubber case it is less of ergonomic nightmare and I don't fear that it will slip out. Why on Earth would you want a thinner phone? (I'm not even talking about subpar iPhone batteries)