no, you dont. you can jailbreak your iphone and run it on tmobile's network, if you have a tmobile sim card. but on tmobile, you cant have 3g speeds, only 2g.
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.
no because an iPad isn't a computer
Us Jailbreak me on the iPhone 4 if you have the firmware 4.0
No but you can jailbreak an iphone or ipod touch but they each have different sites to jailbreak your ipod/iphone
Can you use a verizon iphone with tmobile account
Jailbreak your iPhone
You need to use the program RedSnOw to jailbreak an iPhone 5.
You need to use the program RedSnOw to jailbreak an iPhone 5.
There isn't a jailbreak for the iphone 4 yet, but there will be in the near future.
I would believe so, it can be difficult to unlock your iphone though but the iphone is exclusively at tmobile in Europe.
Sure, jailbreak it. Probably not a good idea unless its your iphone.. because stealing.