Thanks to GPP, an iPhone 4S Unlock SIM can now successfully unlock the AT&T iPhones, though the tool, which comes as a hardware accessory, comes in at an expensive $85 plus shipping.

The company enforces this by having the iPhone check the country-code and network-code data stamped into every SIM card. Verizon has more complex rules for unlocking its version of the 4S.

Michael Capozzi (via Chronic) has apparently discovered how to unlock the iPhone 4S (reportedly AT&T version only) without any software or hardware tweaking. The unlock will assist you in using ...

Will Verizon unlock my iPhone 4S? In this edition of Ask Maggie, Maggie Reardon gives one reader the lowdown on which carriers will unlock the iPhone 4S for use overseas and which one won't.

When the first iPhone 4S story was written here on SlashGear announcing said device, it was entitled iPhone 4S World Phone revealed – as it turns out, that doesn't mean the same thing to all ...

If you’ve already jailbroken your iPhone 4 (and it’s so simple these days…), you’ll be pleased to know that the next step toward freedom — the carrier unlock — is now ready and waiting ...

The iPhone 4 carrier unlock won’t be released just yet, @Planetbeing says it isn’t ready for public consumption just yet and still needs a bit of work.

It’s not quite a done deal just yet, but iPhone Dev-Team star MuscleNerd tweeted out that a “promising 4S unlock” had been discovered after a bit of Turkey-fueled hacking. Oddly, his tweet ...

Apple users hoping to get an untethered jailbreak for their iOS 5 devices are going to have to wait longer, as jailbreakers Greenpois0n declare "war" on Apple.