I reckon the ideal size should be 3.5-4 so that it can readily fit into the pocket without much hassel.
Having said that, the resolution of the screen should be good enough (say 480x800)to make the texts more crisp & readable while browsing.
I owned a Samsung galaxy s1 and i want a galaxy sII i feel its better for me.
the best ideal screen size is 3.8 actually.. like mytouch 4g.. y u no check it out or buy one then reply here if im wrong..
Having measured my all my trousers' front pockets (no more jeans I guess!) and worked out the minimum size to do a minimum of scrolling, I'd like a phone screen of around 6 to 6.5 inches (152 mm to 165 mm) diagonally, provided the overall phone/tablet length is no more than about 170 mm, and the width no more than about 100 mm. So the bezel needs to be phone-like, not tablet-like, with the screen stretching to near the edges of the device. At the moment, all the 7" tablets are just too big to fit in my front trouser pockets, especially when sitting. Maybe Samsung are planning something that size? So far their larger screened devices drop 1.2 inches each model: 10.1, 8.9, 7.7, 5.3 inches, except for the missing 6.5 inches. Also, when will more clothes manufacturers start taking note of the increasing size of phones and start making pockets and trouser legs a bit more roomy to handle the growing phones and phoneblets/phablets/tabphones/phonetabs, not to mention for skirts and dresses.
well, there is NO such thing as a perfect size. to begin with, the size of the HAND is to be considered. besides that, the browsing/playing/talking quota gives you the optimal size of the screen. i agree that Samsung Galaxy Note makes you look a little funny when you use it as a phone. but hey once you use one of these marvelous devices... you never look funny at somebody else using it. using a headset if an obvous choice. to make a final comment i do agree with the folks believing that even if the smartphone has a bigger screen it has to be light and slim enough. sent from a SGS II.
I have arelatively large hands and good sight,
so I love 4.5 inch HD Screens.
3.5" to 3.7" is perfect. Anyone that wants a higher screen has either poor eye sight or no computer at home.
Have the original desire which is 3.7 and any bigger than that is much harder to manage with one hand unless you have big hands.
If you are holding your phone with one hand and cannot touch the 4 corners of the screen with your thumb comfortably then in my opinion the phone is too big.
Anything bigger than 4 is too big.
Just measure the reach of the lower tip of your thumb. If you need to stretch to operate the other side of the screen, if you need to flex your palm... it is too big ... for your hand. So it will probably be unpocketable in pants your size. Again clear sign that people's desires easily verse in not pratical territory. Beyond 4 inches is a sure path to "carpal tunnel syndrome" class action lawsuits. That is why Sony-Ericsson released phones with the same architecture and resolution but different screen sizes.