How much money does it cost to unlock an iPhone?

I have T-Mobile and I really want an iPhone. But, sadly T-Mobile doesn't carry the iPhone! So I was thinking about getting an iPhone from The Apple Store and bringing it to T-Mobile to unlock it! How much does it cost if I get the iPhone 4? Also, how much would it cost if i get the iPhone 4?

Will my iphone 4 work in Australia?

I just bought an iPhone 4 and will be traveling from the US to Australia. Will I be able to make the occasional call with my iPhone? My provider is Sprint. I understand it may be expensive per minute, but I just want to know if upon arrival I can step out of the airport dial a friend in Australia's number and it will go through. If not, what do I need to do to make this happen?

Iphone video folder in camera roll?

I use iPhone 4, IOS5. Usually both photos and videos which I take go to the camera roll.

I also use the application called "camera+" and took photos with it on 31st Dec. I also took two videos on that day, with iphone camera, not "camera+".
And I saved photos I took through camera+ into iphone's camera roll.

When I checked camera roll All folder, all the photos I took with camera+ were in it, but the videos I took with default iphone camera were gone. (Because the date is the same, so they re-wrote on those?)
But when I choose "videos" folder, then those videos I took on 31st appear.So, videos exist, but I can't copy to my computer or I can't move to anywhere.

Since those videos are precious to me, if there's a way to save those videos (into computer), or maybe move back to "all" folder? Please advise me.

I tried to attach with email, but it said "too long". Videos are around 3 minutes.

IPhone 4 problem with songs?

Okay so I have a iPhone 4 I've been using for like 3 months it's perfect I got it from some girl on Craig's list. But when I got it I backed up my 3GS and then restored the 4 with the backup of the 3GS so I could still have all the text messages and such. It was fine but I go to try to put music on this iPhone 4 today and it says that In order to change it to manually sync whatever song you want I have to erase everything on this phone and sync it wit iTunes. But if I did that could I do the back up and get everything back or no? Would I loose everything?

Is it easy to unlock a sprint or verizon iphone 5?

I'm planning on ordering a iphone 5 off of ebay because i would like to go with a gsm carrier such as simple mobile or h20. But i need to know the a sprint and verizon iphone 5 is easily unlockable.

I send texts but they sometimes don't make it to the sender?

I have an iPhone 4s on current ios.
Having problems sending text messages, not iMessages
Text sends and doesn't ever show "failed" or "not delivered"
Receiver doesn't get them all the time.
The receiver has an android.
Is there a fix for this? Why aren't they being delivered when my phone shows it sent successfully?

What is the best cleaning product to get permanent marker off of an iPhone case?

I just bought a case off of amazon. It's sort of a bumper like the iPhone 4 came with. Well, I was playing around with a pink sharpie and I ended up getting some on my case. I've tried bleach, peroxide, and a multipurpose cleaner. Nothing seems to work aha. I'll provide a link to the case below. I don't know if the material would make any difference for the product needed to clean it. Thanks in advance!

http://www.amazon.com/...009AY0R2I/

I can't remember my password?

My Iphone says "Can't Get Mail" the user name or password for imap.mail.yahoo.com is incorrect. Don't remember my password.

What should I know before getting in-dash Navigation?

I'm purchasing a 2010 Chevy Malibu next month and I'm wanting to install in-dash navigation with bluetooth. The reason being is I'm driving from St. Louis, MO to Portland, OR in August by myself and want to have the most reliable navigation. I don't want to have to read a map, since I'll be alone, and I can't rely on my IPhone navigation because I have Sprint and who knows when I'll lose service driving half way across the country. I'm not a fan of things mounted on my windshield or sitting on top of my dash. Hence the reason for in-dash. Since I've been researching different systems, I keep seeing lots of them saying the navigation works only with IPhone apps, like Garmin or Telenav. That would defeat the purpose of purchasing this. Are there any good systems with built-in navigation that does not require an app? It would be even better if I could find one that I could even program a specific route into. I also have to have bluetooth and one that I can plug my IPhone into. I want to be able to make wireless calls, direct Siri and stream audio while I'm driving. Any suggestions will be appreciated. Also, don't be a sarcastic a**hole. I don't know why people are sarcastic a**holes on this site. It's annoying and I'll just ignore your answer.

Added (1). Thanks for blatantly ignoring my question, Mark.

How to get my iphone 4 jailbroken? - 1

I want my iphone jailbroken So badly!
i just don't have a computer right now tho, can i do it some way from my phone?! & please no rude or sarcastic comments

Added (1). @Isabella NOW! WHO THE H3LL IS MICHAEL SCOFIELD? I ASKED FOR NO SARCASTIC ANSWERS!