Can you unlock a iphone 4 by jailbreaking it?

Kareem

I want to unlock my iphone 4 for tmobile. Its ATT right now. Can i unlock it by jailbreaking it? What can I jailbreak it with?

James

Not legal in the US to unlock phones anymore. The No carrier is going to allow you to do that.

http://abcnews.go.com/Technology/now-illegal-unlock-cellphone/story?id=18319518

Will jailbreaking my iphone 4 remove the unlock i have for tmobile? I want to jailbreak my iphone 4 which is currently on ios 6.1.3 if i do this will it remove my unlock that i got for tmobile. Att store was the one that unlocked my iphone.
Will Jailbreaking my iPhone 3GS ruin my unlock? I have an AT&T iPhone 3GS on 6.1.3 (I know there's no jailbreak for it yet, but I know an untethered is being made) and I have it unlocked to be used with T-Mobile. If a untethered jailbreak comes out for 6.1.3, will my unlock be ruined and not let me use my T-Mobile services? ps. I have it unlocked, not jailbroken, so I don't have cydia
Will jailbreaking iPhone unlock it? I have a black sprint iPhone 4S, and I have t-mobile. IPhone 4S's come with a sim card holder and tray too, but I have to go to sprint directly to unlock it for a high fee. I heard if I jailbreak it, it gets unlocked and I can use t-mobile with it! Is this true? Will jailbreak unlock an iPhone 4s to use any carrier, and if so how do I do it?!
Will jailbreaking an iphone also unlock it? I have bought an iphone 4 from japan and i'm from the philippines. I tried inserting smart/globe sim card and it says invalid sim. so do i need to unlock it before jailbreaking? or will jailbreaking also unlock its sim capability?