Unlock iPhone 4?

[Kelden]

I have no idea if I can use my iPhone in the US.
I live in Taiwan and bought the phone there. I'm going to stay in US for a while and I bought a pre-paid sim card for myself. It starts for one month the second I put it in my phone, so I can't test it beforehand. Can anyone teach me how to find out if a iPhone is unlocked or not? I guess it probably isn't, so how can I unlock it?

Thanks,
kelden

 

[Jmills87]

Tell us what you're baseband is. Settings>General>About>Modem Firmware

 

[Kelden]

Tell us what you're baseband is. Settings>General>About>Modem Firmware

It says Modern Firmware if thats the same thing. Its 04.12.01.
Thanks in advance!

 

[h2olover1]

That cannot be unlocked. You might want to call you provider and ask about a carrier unlock

 

[jayleen]

sir,
i want to unlock my iphone 4 locked with 3 uk .
kindly let me know the process to unlock it......

 

[h2olover1]

sir,
i want to unlock my iphone 4 locked with 3 uk .
kindly let me know the process to unlock it......

As i said, there is no way to unlock that baseband. Call 3 and ask for an imei unlock. If they dont do that, you cannot use your phone on a different carrier.

 

[Kelden]

Thank you for answering my question.
I guess I won't be able to use my phone in the US then.