How do you close out a web page using Safari on the 3G?

What you can do, is in Safari, on the bottom right of the screen, there is a little picture of 2 small squares or something, click that, then on the bottom left of the page, click "New Page", and once a second page pops up, you can then click on the icon on the bottom right of the screen again, and then click the little "x" on the top left of the page that you would like to exit out of, which will just leave it with a blank page.
Another thing to do, is just go to a new URL (I use www.apple.com), then exit safari, so next time you come on Safari, it will open that page.

You can open a new page (press the button on the bottom at the far right), choose new page. Then press the button on the bottom right again, slide toy toyr old page, and close it.

I know these instruction are somewhat convulated, but I don't know what the button is called.

The only way I could avoid this breach of security was to clear the Safari Browser
cache, history etc each time after closing Safari.

Why is it a security breach? Were you using a public iPhone?

Were you absent the day the story broke on the national news about the security flaw that makes even a locked phone accessible?

Were you absent the day the story broke on the national news about the
security flaw that makes even a locked phone accessible?

Actually that story broke here first, and that problem very easily remedied. But I still fail to see why the situation you described is a security flaw itself. In twenty years of carrying various cellphone and other communications devices, I have not lost a single one, nor broken one. Safari is working the way it was designed to work. Now if I was logging in to my stock account in a public library, I might be concerned. But my cell phone is on me, in my pocket and no one ever uses it for anything except me. I do not loan it to anyone, unless I am there watching that person for the duration of the call (that I probably had to dial). I do have a passcode configured, but it is set to 4 hours.

I just don't see the excitement.