I read the first two pages, and then I noticed that I haven't actually used the SIM card menus of the various cards I've had even one single time. I have given them a glance, but I still haven't found any actual use for them.

I have Nokia N900. I didn't buy it for the SIM card menu (I don't even know if my current Vodafone IE prepay card has one). I bought it for web browsing, email and messaging. And videos. And music.

If I want to check my balance, I can do it online.