Warning: Don’t tell your IMSI and Ki to anyone, you’ll risk SIM card being duplicated and used by others !!!
The way showing here is discovered by ozbimmer on Hackint0sh forum. I just detailed some of the steps to make it easier to understand.
Before we begin, let me clearify some points:
1. This method is not unlock, it just cheats iPhone to “think” the SIM is an AT&T, there’s nothing to do with a real unlock which removes the PN lock.
2. With this method, you may call out and send SMS’s. There’re restrictions in receiving call or SMS’s: only while you are calling out can you receive incoming calls (if you have call waiting enabled) and SMS’s.
3. If the original SIM (the one you replicated from) is online along with your iPhone’s SuperSIM, your iPhone will be disconnected from the mobile network immediately.
4. Don’t put your original SIM into mobile during and after the SuperSIM creation.
Requirements
SuperSim Card Reader/Writer
A local mobile provider’s SIM
A blank SuperSIM
AT&T’s 3G SIM
An unlocked mobile
An iPhone
An Intel Mac or Hackintosh
Before You Begin: Activate
You must activate your iPhone using the iASign method, and use your AT&T 3G SIM’s information to generate the plist file. Remember, activation before going on.
Step One: Crack Ki
This step is vital, your must crack your SIM’s Ki to replicate it. AFAIK, 90% of the China Mobile SIM’s can be cracked.
Step Two: Essential Information
Record the following information before you preceed:
1. Information from AT&T’s 3G SIM: IMSI, ICCID, we’ll use IMSI-a, ICCID-a to indicate them in the following steps;
2. Information fromo your local provider’s SIM: IMSI, ICCID, Ki, we’ll use IMSI-b, ICCID-b and Ki-b to mark them.
3. Your SMS communication center number. This is +8613xxxxxxxxx for China Mobile.
Step Three: Write SuperSIM
Notice, we need to write SuperSIM for twice, and this is the first time. Write the SuperSIM using ICCID-a + IMSI-b + Ki-b. After completion, put the SuperSIM into an unlocked mobile, then try calling out and sending out an SMS.
Step Four: Write SuperSIM (Again)
Write the SuperSIM using ICCID-a + IMSI-a + Ki-b. After completion, do NOT put the SuperSIM into unlocked mobile, put it directly into the iPhone.
Now your iPhone is able to call out and send out SMS’s.
Enjoy!