Why doesn't cydia work on my iphone 4?

I jail broke my iphone or at least i think i did. When ever I open up cydia it says Preparing Filesystem (Cydia will exit when complete) and all it does is reboot my phone and nothing happens. What's wrong with it I need answers fast!

How to update old iTunes (2nd gen iPod touch) to iPhone 5 without deleting songs?

Ok so i just got a new iPhone 5 and i'm afraid that if i plug it in onto my laptop and update the iTunes, my songs on my iPod (2nd gen) will all be deleted. This has happened to me once when i updated my iPod nano to my iPod touch agees ago. Please help! Ohh and one more question, how do you transfer or sync the songs from your iPod to your iPhone?

Where to order bulk iphone cases?

I want to order a bulk of customised iphone cases for a sorority… What are the sites or companies that specialise in that category?

Unlocked my iphone from o2 but meteor sim card won't work?

I unlocked my iphone from o2 the other day and it gave me instructions on how to set up the new sim card via itunes. I followed them but even though the phone says meteor in the top left corner of the screen it won't give me any bars for signal. Any ideas what could be the problem?

Itunes won't let me update my iphone apps?

Everytime i go on my itunes 11 it says i have 1 app to update ill click on it and it will say all aps are up to date but then it will still say i have 1 to update? And everytime i have 2 or more i click on it and it lets me updat eall apps up to that 1 and it still says theirs 1 that needs to be updated even thoe they all seem to be up to date?