Keypad lock

What is one of the biggest problems with smartphones? With me it seems to be the keypad unlocking itself in my pocket. So far I haven't called anyone by accident, but I think it might happen one of these days. SlideUnlock works in a similar way as with an iPhone, in which you have to slide your finger across the screen to unlock it. I use this as a sort of backup keypad lock, since after I unlock the keypad in the traditional way I get the SlideUnlock. It does seem a bit weird to unlock the keypad twice, but I think it is useful since it is pretty much bullet proof and the keypad cannot unlock itself inside my pocket. This is a useful program for anyone who is afraid that their N8 might call someone by accident. http://store.ovi.com/content/47631