[Question] my new inew i6000 little problems

[welkominspace]

hey

i have a few questions about my i6000
i just got it today and am planning to put a other rom on it in a few weeks

but untill i do that i have a couple of problems :

when ik turn my phone everything turns with it except the home screen, did i mis a setting or is it supposed to be like that or what?

and that weird sound it makes when using the powerbutton to go to home screen.

and i have some trouble with my 3g, i believe i saw al 3g symbol next to the connection bars but mostley only the bars in red and an "E" next to it or a "H"
what is that about? is that because i'm inside or something?

when i put my simcard in it told me that it could not install the setting because it's a unknown phone.

but it does call,text and has internet but very bad

hope you guys can help me