My iPhone 4 was originally from US but I would like to use it in other countries, Can I use your sim to unlock it?

Yes! Both Gevey and China3gpp unlocks all iPhone 4 and you can use it anywhere in the world.

I bought my iPhone 4 in a different country other than US. Can I use your sim to unlock it?

Yes!

Which firmware do you support?

We support all iphone 4 firmware, including 4.3.1, 4.3, 4.2.1, 4.2, 4.1, 4.0.2, 4.0.1, 4.0

Which baseband do you support?

Our product support all current iPhone 4 baseband, including 04.10.01, 03.10.01, 02.10.04, 01.59.00

Do I need to jailbreak my iPhone 4 before unlock?

No, with our iphone 4 unlock sims (Gevey and China3gpp). No jailbreak is required.

My iPhone 4 is jailbroken, does it make any difference?

It does not matter whether your iPhone 4 is jailbroken or not. Unlock sims work the same.

Is unlocking iPhone legal?

Yes, completely. On July 26th, 2010, US government announced that jailbreaking and unlocking iphones is completely legal. It has never been illegal but it is not completely legal.

Where do I find instructions on how to use your product?

Please refer to the "How to" section of our site. Brief instructions are also included within the sims memeory and will popup before unlocking process.

Which one is better? Gevey or China3gpp? What's the difference?

Both Gevey and China3gpp exploited the same loophole so they are completely replacable. Just like gas from two different gas stations. We recomment China3gpp as its tray design uses advanced material so that it is easier to get in and out. Also it's unlock wizard has a nice failure detection feature so that in case some steps are performed wrong, it will tell you.netmes89

My sim is a big old sim, what do I do?

Most users have microsim now. unless your sim is more than 3 years old, and the metal piece is bigger than the micro sim, you can go to carrier shop and ask for a micro sim. Most cases, they will do it free or charge a small fee ($10 or $15)