Samsung phone Detailed Features

I Want To Know About The Full Detailed Feature i.e.

1) What is talk realiability of 10 hrs ?
2) There is a vga camera, what abot its clarity & zoom feature?
3) Music player play all the songs direct from memory card as all songs in play list or there is only 4 play list by default & each limit is only 30songs to pick up from 8gb memory card, that if there is suppose 400 songs play list capacity only 4x30=120songs play at a time. I thing this is very poor software usage,is it possibleto correct??????????????????????
4)Other thing is that if want to set wallpaper or ringtones, a picture or song from memory card it must copy to phone memory then possible, but other brands not to have, is it corrected???????