Which is preferred oldest browser and shortest Screen Size of mobile to test website and which has Facility to surf Internet and still in use? [closed]

Question

Which is oldest browser and shortest Screen Size of mobile which has Facility to surf Internet and still in use?

I'm making a Mobile site for Older devices (Not for Smartphones), which are still in use.

I'm testing on Nokia 5130 Xpress Music mobile which has size of 240 x 320 pixels and Browser is Opera Mini (Version I don't know).

Is it enough to test on this, these days or I should test on lower size than this and less capable browser than this?

Any suggestion?

Edit: Like in desktop we don't consider screen size lower than 1024 X 768 px and We have started to not to consider IE6, Firefox 2 and 3.0 etc.

So is there any criteria like this for Screen and Browser for Mobile phones?

Answer 1

Take a look at what devices are used for surf Internet (sorry for Russian, that site doesn't seem to have English UI - but it's pretty self-explanatory) - you'll probably be amazed how many people still use "feature phones" with fairly small screens and Opera Mini (Java ME-based) to surf. While touch-based smartphones (such as iPhone) slowly grow, more than 50-60% of total mobile users still use fairly small screens and simple devices.