I have tried to explain that already. The smaller the device the easier it to EDC and protect. The screen size does not matter much for a personal use, only its resolution. The map coverage on HD tab and on HD phone is exactly the same. I believe that 5.5" is ideal, as it provides usable onscreen keyboard already, but still perfectly pocketable device. Get reading glasses (the thin optics, I've recommended, is great because you can attach them right to the phone's back), and your screen size will be perceived as a huge HD tv screen or computer monitor. I have a tablet as well, galaxy note 10.1 (also with the Vacom stylus, as I would never buy anything without it ever) and I love it, however, 99% of the time I'm using the phone, while the tab is sitting on the charger nearby. Because there is no difference in capabilities at all, but the phone is much lighter and easier to hold in one hand.