Why does the BlackBerry 8900 always automatically connect to the Internet?

That's because you have an online program backstage. Look at the silent update interval. Mine is a two-hour update. You must receive data at any time, because you need to receive mail. If you are an office worker and need to handle a lot of mail, you can use it. If there are not so many, you can use your browser to receive emails, which can save a lot of traffic. 89 doesn't need traffic, but it needs some software. 89 is still a very good one.