ICCIDs are, to grossly oversimplify things, a type of SIM unlock code for iPhones.

They enable you to use any SIM locked iPhone 5S or newer on United States GSM networks, and some CDMA networks. See the FAQ for CDMA support requirements.

There are no issues with 3G or 4G LTE data, FaceTime or iMessage, unlike previous solutions such as Gevey Ultra.

ICCID codes are often blocked by Apple (as you would expect), and until my site existed, it was hard to find a working one. My server automatically searches for a working ICCID, so you will never be left without one.

In order to enter the ICCID in the phone, you will need a device such as the R-SIM 14 (available on eBay).

This does NOT unlock passcodes or iCloud lock. It is simply not possible. If you ask me, I will block or ignore you.

Q: Why do I need to enter a security code?
A: Some people were using automated bots to try to search for the latest ICCID, which makes the ICCIDs get blocked faster.

Q: What iPhones does this work on?
A: iPhone 5S or newer. Important: They must be on the latest iOS version (or latest beta)!

Q: What carriers does this work on?
A: You can unlock from any carrier except TracFone/Straight Talk, to all United States GSM carriers, and some CDMA carriers. If you activate your SIM in an officially supported phone first, iPhone 6 and newer work with Verizon and Verizon MVNOs, if they show a MEID in Settings. CDMA networks which do not fully support VoLTE, such as Sprint and U.S. Cellular, are not supported.

Q: Can I switch SIM cards?
A: Yes, but you will have to re-enter the current working ICCID.

Q: Does this also unlock the eSIM on iPhones which have one?
A: Unfortunately, it does not. No one knows why or how to fix it.

Q: How are you finding these ICCIDs?
A: A combination of lists from Chinese websites, and ones I found myself with secret methods.

Q: How are you checking them so quickly?
A: I have a jailbroken iPhone modified to check ICCIDs automatically, which connects to my server.

Q: Do you have an infinite number of ICCIDs?
A: Unfortunately, no one knows how to generate ICCIDs quickly enough to have an "infinite" number, but I have a very large number of them. It is unlikely, but possible, that I will run out.

Q: Can you make a public ICCID validity checker?
A: No. It will put too much strain on the server.

Q: Will this website always be free?
A: Yes, it will. I made it for the good of the community.

Q: Can I use your ICCIDs on my own site?
A: Yes, but you have to buy access to the API. See the bottom of this page for more information.

Q: I bought a new iPhone and immediately unlocked it. Apple's site does not show it as ever having been activated, so the warranty is invalid. How do I fix this?
A: Either factory reset it, or manually deactivate it using the "Flash & JB > Advanced > Deactivate" option in 3uTools. Then, go through the complete setup without any SIM card inserted.