Why can't I get service on my iPhone 4?

For the past few days my service comes and goes. It has nothing to do with my area as everyone around still has service. I've tried turning it off and on. I've tried taking the sim out, I've tried turning it on and off of airplane mode. I restored my network settings, I restored All settings. I've run out of ideas. In the upper left corner it says "Searching… " or "No Service.". The first time this happened, it lasted for 17 hours! Then I regained service for a couple of days and then it went off again for about 7 hours. Now today it's been out for the past 9 hours. ANY IDEAS before I call AT&T tomorrow!

How long does an IPhone backup take?

ITunes is already about 30 mins backing up my iPhone and last time I backed it up was around may.

How much longer should it take? And why does it take so long?!

Itunes can't find my files and I don't know where they are?

I recently downloaded around 50 or so songs using video2mp3.net. When I download the song from the website it has the option of opening the download when it's complete, saveing it, etc., and each ime i just click open because it automatically opens the song in my itunes. After syncing my music to my iphone tons of the songs have exclamation points next to them, saying that they can't be located. I can't find where my computer downloaded the files to, can someone help please!

Icleaner deleted some app icons how do I fix it?

I have a jailbroken iPhone 4, 5.1.1 and I downloaded Icleaner and it cleaned up my phone but in the process it deleted the icons off of all the default iPhone icons ( the icons that are on the phone when you first buy it like messages weather safari calc and so on) so now the default icons just have a white square as the thubnail. IS THERE ANY Way TI FIX THIS IT'S DRIVING ME CRAZY! I've tried using different themes and nothing is working.

My iPhone says device blocked from network service how do i fix it?

I took my AT&T simcard out of my white iphone4 and put it into a newly restored, black iphone4, started it up, and then put the simcard back in my white iphone4. Now when i try to text, it fails, and the calls just say: device blocked from network service: how do i fix this?

If I plug my iPhone into a public computer?

I was using a friends computer to look up some things today, and I plugged my iPhone in the USB port to charge. After about 5 minutes a window popped up and had pictures from my phone on the screen.
I exited the window quickly, I'm just wondering if this means these pictures are stored in my friends computer?
I didn't click on anything to download them.

What happens if I try inserting my T-Mobile SIM card in my iPhone 4S?

Apparently, I just got an iPhone 4S for AT&T without contract and not unlocked. I notice that my T-Mobile SIM card is too big for the iPhone SIM card slot, but I'm pretty sure you can cut it to a good size and yet it may be risky. My plan for T-Mobile is the Pre-Paid plan; it has minutes and balance on my phone. I paid a hundred dollars for 1000 minutes and text messages, 3G disabled on my HTC MyTouch 3G device. I want to unlock my iPhone 4S but I don't want to jailbreak it. My oldest sister told me that when she placed her AT&T SIM card on the iPhone 3GS, AT&T automatically charge you monthly for the data plan even though if cellular data's turned off. She also told me that unlocked iPhones are iPhones that are capable for any SIM cards. So my questions are:
1.) Do you guys think my SIM card will be broken if I try cutting it to a smaller size?
2.) If my SIM card breaks, is there a way for me to obtain another SIM card (For T-Mobile) with the SAME PHONE NUMBER, CONTACTS, and PREPAID PLAN? If yes, how much will I need to pay?
3.) Will T-Mobile automatically charge me for data plan if I insert my SIM card to my iPhone 4S?
4.) Do I need to jailbreak my iPhone 4S in order to unlock it? Anyway to unlock it without the jailbreak process?
5.) Any warnings? Tips that I should be aware of before desiring to do this on my own risk?