i think you should go into T Mobile and see for yourself.
The S300 is tiny...the V205 might be better.
I suggested T-Mobile cause that's in your profile...i suggest you go yourself, because we have no idea how poor your eyesight really is.
I think you need a big colour screen, i was going to suggest the upcoming Nokia3650, but the key pad is small and has an unconventional key pad (it's round)...but spaced out pretty good and it has a nice big colour screen.
it also has a nice built in camera like the V205, but that's probably not a high priority.