It's useless. My credit limit is RM100 only for both data and voice but M the blood sucker once charged me RM200 over just for data.

I'm using one of those. Pretty decent leather case I must say. Even the chrome part is protected. It also allows you to have full access to the touch screen. Some leather case like the one from PDair won't let you do so because the edge of the touch screen is blocked by the case itself. You'll have a hard time swiping down the taskbar.