How to unlock iphone 4 without sim slot?

I have an iphone 4 for sprint it does not have a sim card slot and is running 5.1.1 and jailbroken is there any way to unlock this phone i repeat it does not have a sim card slot it there any way to unlock? I'm trying to get rid of my old number which is stuck on the phone because i lost it and found it

How much memory would about 400 songs take up on the iPhone?

I'm getting a 16 gig iPhone 4s and I already have an 8 gb iPod Nano that I share with my little sister and we have 408 songs (4.6 gb used, 2.7 gb remaining) on it. Probably about 80% of my music takes up the space if I put around 300-400 songs on my iPhone would it take up too much memory, considering internet, apps, photos, etc?

HOW MUCH SHOULD MY VERIZON BILL BE?

Currently my parent's phone bill has two smartphones on it -- a Blackberry Curve & Droid Incredible; both with unlimited text and talk. Since my dad just got a new job, he was given a new Droid, so my mom took his old one, and sent her BB out to be refurbished. How much would our monthly hill change if I got an Apple iPhone 4S 16GB? I would only need unlimited text, as I hardly will ever call anyone.

Will there be a fee to turn in the blackberry and switch it to the iPhone?
*i'm only switching from the BB to the iPhone because I'm doing a fundraiser for The United Way, and Verizon is sponsoring it, and Verizon is hiring the entertainment (me and my dance class) and paying us cash, and we get to chose a phone and accessories from the store, and if they don't let me chose the iPhone, I'll just buy it seeing as my birthday is coming up soon

Iphone 3gs headphone jack only half works?

Half of the headphone jack on my 3gs randomly stopped working. Its the right side. I tried cleaning it with the q tip and rubbing alcohol but it did nothing. When i push the headphones to the side with significant pressure, the sound works, but its nearly impossible to hold it. The headphones themselves are fine. I wanna wait for the new iphone to come out so is there any way to fix this until then? :/

Will my iphone be fixed/replaced for free (screen crack)?

I cracked my screen today! I bought my iphone about 7 1/2 months ago and I was wondering if apple would fix it.
I'm on att and i did buy insurance through them, but it is unclear whether they will fix it or not.
Should i go through apple or att?
Any help would be appreciated

Music disappear after restore?

I restored my iphone 4s recently. Before it i had 130+ songs and now i only have 80 some. I can't remember all of the songs but i have remembered some of them. They have disappeared from my itunes and iphone music app. Its not in purchased or anything. Its like they just disappeared. Any help?

Got iPhone 4S wet, then got new battery, now shuts off when unplugged?

Okay, so I got my iPhone 4S wet (got in the pool with it in my shorts' pocket, lol.). We dried it out in rice and took it apart and dried it, but my phone would only stay on for like 15 minutes at a time. It would turn off, then reboot and turn back on.
So, we got a new battery, and it worked fine until I unplugged it. As soon as I unplug it from charging, it turns off!
What could be going on?
I Really don't have 200.00 to spend on a new phone!

Why are my iPhone videos not in sync with audio when moved on to my laptop?

So when move videos i take on my iPhone 4s or iPod 4th gen to my laptop which is running Windows 7, all of the videos are not in-sync with the audio it was recorded with. They all work fine on the devices but never when I move them to my laptop. All I do is drag and drop the video files from the iPhone to my laptop. I do not use any converters.Am I doing something wrong?