yes,the 5.0.1 jailbreak came out !Official EasyRa1n Unlock/Jailbreak iPhone 4/4S iOS 5.0.1
No, you can even unlock the iPhone when Jailbroken.
Us Jailbreak me on the iPhone 4 if you have the firmware 4.0
To unlock iPhone 3gs on iOS 4.1 you have jailbreak your device first.
There isn't a jailbreak for the iphone 4 yet, but there will be in the near future.
PwnageTool 4.2
Yes, but first you must unlock and jailbreak your iphone.
The benefits of unlocking an iPhone 4 are clear, but how exactly do you jailbreak an iPhone 4? There are many websites that offer tutorials on how to unlock the iPhone 4. These websites typically charge for the instructions. You can also bring your iPhone 4 to a phone service business that offers unlocking services. It is important to remember that it is legal to unlock your phone, even if Apple does not want you to do so.
To unlock your iPhone with you Tmobile SIM card I would suggest you goto easyiphoneunlocker.com they have a very easy to use tool to unlock and jailbreak your iphone. I was able to unlock my iPhone 4S within in 10 minutes with no issues.
You can not get Siri if you jailbreak a iphone 4. In order to get Siri you have to download the app.
No it is not. It is for AT&T unless you "jailbreak" and "unlock" an iphone. Instructions to do this can be found on the internet.
yes use limerain