IPhone 4 with iOS 7 Beta 3 Error?

I recently just updated my iPhone 4 to iOS 7 beta 3 over the air. Updated fine, but now the phone goes to the apple screen, goes black, and starts again and again. What can i do?

YouTube problems on iPhone and PSN?

Ok so 2 days ago I noticed that on my Playstation 3 the YouTube app no longer showed my recent subscription videos OR any of my subscriptions but I can still watch videos if I search for them. On my iPhone 4 however it just says "Tap to retry" as soon as you open it and it never searches or loads a video. Any tops/advice? Or is this just YouTubes problem?

Can you unbrick an iPhone 4S?

I was wondering, if i upgraded my iphone 4S to ios 7 Beta 3 without a developers account with a mirror link stuff, and for some reason i get the message saying my phone is not registered, (and it is put in an unusable state) can i fix that? Is it possible to put my phone in DFU mode and just downgrade back to ios 6.1.3 stock firmware? Or does that not work

please only respond if you know what your talking about

How much would it cost to fix?

My friend found an ipod touch on the side of the rode in perfect condition. He then got an Iphone and gave the ipod to me for free. He didn't mail it properly and it ended up getting majorly damaged in the mail. The screen is cracked and it won't turn on. It brings up that I need to charge it but even after hours of charging is still says it needs to be charged and won't go any further than that. Does anyone know of a cheap place to fix it and if so about how much do you think it would cost?

Will iPhone purchased in US work in spain?

A friend of mine is visiting from Spain and she would like to purchase an iPhone. When she buys the iPhone does she have to sign up with a phone company right away or can she buy it and take it home to sign up with whatever phone company she has there?

IPhone 4 Battery Changing Problem?

I recently ordered a new higher capacity battery for my iPhone 4. I had the phone off, & when i attached the new battery, it didn't do anything but after a few seconds it sparked and let out some smoke. I immediately took the battery out and put the old one back in, and the phone and old battery still works fine.

Is the new battery broken? Or is that okay?