hi, i'm currently on orange and want to 'upgrade' my phone - i say upgrade, what i really want is a cheapy mobile that i won't mind dropping, losing or breaking if i'm out. obviously this will only work if i can keep my existing mobile. is this the case or do i have to 'trade in' my 'old' phone if i upgrade. also is it possible to clone my sim so that i can use the same number for both phones without having to swap sim's to the phone i want to use - or is that the only way to do it. i was looking at the nokia 5140 - a simple ruggedised phone that would suit what i want down to a tee. anyone used one? got opinions of it? cheers julian