I bought a Samsung GSIII and it can be used with my Rogers SIM card in Canada. After I updated the phone to the latest firmware today, after it turned on, it said that I need a SIM network unlock PIN. What do I do with it. I can't use my phone anymore. Before the update, everything was good, I can call, use my services, but now i have to provide a code that i don't know to use my SIM. How do i solve this problem?