Why can't I use screen on IPhone 4s?

My phone was working fine this morning. Had USB connected to phone and car to play music. Now I can't touch the screen or open apps or slide to unlock the phone. But if I tell siri to open my messages then I can type perfectly fine. I can't even turn my phone off to restart it. How do I fix this?

My iPhone won't receive texts?

I recently got given a iPhone 4S by cousin as she got an upgrade. I'm with Vodafone. I can receive texts when I'm in my own Wi-Fi area, but whenever I'm not at home I don't receieve any of my texts till I reach home. Receiving calls is fine. Is there anyway I can receieve my texts?

How to transfer from a nokia to an iphone 4?

I normally use a Nokia 6300. I have just bought a second hand Iphone 4, went to transfer the sim card but it's too big for the sim card space in the Iphone. I'd like to know how i can keep all of my sim card details/texts/photos/messages and tel number and swap to using the Iphone? I'm not very technically minded. Have had the same Nokia for years! Please explain in simple terms.

Sim card help for Iphone 4 please?

I'm currently using a samsung galaxy Y phone which I really do not like and want to get an Iphone4 but I know this uses a micro sim card and I have an ordinary one.
My question is can I cut it down to fit the iphone or do I need a new one.
Thanks
And if anyone has any advice on the best phone to get I would be very grateful as My galaxy Y has virtually no memory in it and its driving me mad