If i put a sim card in my iphone 4s what message will come up about unlocking?

I want to get my phone unlocked but before i do i want to know what will happen when i put my sim cad in? Say i know the code and i put my sim card in, what message will come up about unlocking? Please could someone who has done this tell me what message comes up before they put their code in

When you insert an other network SIM card, your phone displays an error message saying "Wrong sim" or "Incorrect sim" or "Emergency calls only", etc., then your phone is probably locked.

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