After the long chase for an Iphone 4 32gig I finally got my hands on one on Sunday the 22nd 3 days old from opening.

Pretty much tried everything on it and thought it was a bit unresponsive 1-2 sec lag sometimes.

This being my first iphone ever I didn't really know what the norm is so had a friend have a go on it and he also said there is an unresponsive problem and when the CAMERA APP is opened to use the camera it took around 20-30 seconds before the take picture button or any button would respond. 

After some searching on the internet I noticed a lot of people had camera problems with extreme cases where it crashes the phone or the virtual shutter wouldn't even open.

I'm guessing the Iphone 4 I got has a touch screen problem as pressing the other buttons such as the home button would function instantly 

Any how I have tried all the trouble shooting with restore etc. And proceeded to call Apple Support where they noted the case and gave me a case number which I'm meant to take to the Vodafone store I got my faulty iphone 4 from, I've heard It could take two weeks before I can get another iphone or would they do a straight swap? 

and How about the micro-sim problem where I wouldn't be able to use my phone number until the iphone is back, should I ask them to give me a normal sim to transfer my account to for the mean time?

any advice would be appreciated!