Hi sahidul, i don't know what do you mean lock and unlock code. Did you mean unlock code to make your phone can use any sim card? If that unlock is what you want, you can get it from your network provider. Just call them and make request about
samsung sgh -f480i unlock code, but you need a very good standing account with your network provider at least 6 month contract then they will process your request. Another method to get
samsung unlock code is buying from third party sites and you just need to pay some bucks and need to wait for a couple of minutes. I hope my solution can solve your problem good luck!
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