Where is user guide?

No user guide is needed for original GPP Sim. For GPP Sim v5.1, user guide is here.


Who is GPP Team? How can I trust this product?

We are a telecommunications company that has been in the business for over 19 years.  We have released SIM based solution products for not only the iPhone and iPhone 4 in the past, but GPP sims are used for a wide variety of SIM based unlock and mobile solutions.


Which iPhone iOS / baseband versions does the GPP unlock?

GPP sim supports all current Apple AT&T iPhone 4S versions. All baseband, all modem versions!


Do I need to jailbreak my iPhone 4s before unlock?

No, GPP is an out of the box solution.  Just put it in with your SIM card and your phone will be unlocked.


How hard is it to unlock the iPhone using GPP Sim?

Super Easy! GPP Sim  work out of box, insert into your iPhone with your 3rd party carrier sim (E.G T-mobile) and within seconds, it works magically.
No need to dial 112, no need to jailbreak and install software. It works way better than any other sims on the market! 


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

Yes! GPP unlocks all AT&T iPhone 4s models and you can use it anywhere in the world.


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

Currently the iPhone 4S versions that are supported are USA-AT&T, Australia-KDD1 and Japan-Softbank versions.  Support for other iPhone 4S versions will be available within 2 weeks.


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

It does not matter whether your iPhone 4 is jailbroken or not – GPP is an unlock solution that will work with both.


Do 3G and GPRS work?

Yes if you have a data plan with a carrier that offers 3G services.  As long as your iPhone's 3G frequency matches carrier's frequency,


Is unlocking iPhone legal?

Yes, completely. On July 26th, 2010, US government announced that jailbreaking and unlocking iphones is completely legal.


How do I set my APN setting, why it is not there? (new)

iPhone 4S from Apple removed that setting, however there is a way to set it through downloading configuration file. No jailbreak needed. Follow the following setup,

1. Connect your iPhone 4S to wifi (yes, wifi is needed)

2. In safari, browse to

3. choose Tethering

4. choose your country and then carrier, if you can not find your country or carrier, scroll to the very bottom and choose Create your own

5. if case you have to create your own, obtain setting from your carrier and enter it in.

6. download and follow instructions to install



Where do I find instructions on how to use GPP Sim?

Turn off your iPhone 4S or iPhone 4, place your SIM card along with your GPP SIM together into the unlocking tray provided.  Turn on your iPhone 4S and your phone will be unlocked and ready to use!


How do I get my SIM card to fit with the GPP and iPhone 4S?

The iPhone 4S tray is designed to support micro sims.  If your sim is not the proper size, you will need to trim it to fit in the iPhone 4S tray.  This can either be done by scissors or a microsim cutter.  Please be careful not to cut off the SIM contact points.  GPP Team cannot be held responsible for user damage to their own SIM card.