How do i change the sim in my phone cant find the bloody box in house, having prank calls and nasty messages and dont even get the numbers of the people sending them .

damb bloody pranksters....eeyy mate

to remove the sim card there is a small hole to the left of the sleep/wake button on the top. place paper clip in this and it will then give you access to the sim card.

however if you do replace sim card yourself then you may be voiding the warranty. and may not get all the services.

you could always try contacting your service provider to have your number changed.