License code for unlocked iPhone 4s?

My friend unlocked an iPhone 4s for me but he forgot to wite down or save the license code! (the number you type into FuriousMod4S to actually finish unlocking the phone) … Is there anyway I can get that number back or something i can do to get it again?

please and thank you!

Take it t whatever carrier originally sold it (ATT, etc) and get a new SIM. If it's a Verizon, I have no idea what to do as they have no SIM.

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