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Iphone 4 unlock question

ios7 unlock

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I have an iPhone 4 that requires an unlock using what I think is called SAM Prefs. I used this last year when I updated to ios 6 and it worked and was wondering is it still possible to do the same again if I update to ios 7? I have the sim that I used and I have a folder named "Lockdown" saved with other items in that folder called activation_records, escrow_records, pair_records, data_ark.plist, device_private_key.pem, device_public_key.pem. Is this all I need to do an unlock? Any help appreciated as I don't want to update and find I can't unlock the network as the phone would then be useless to me.



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never heard of SAM Prefs before... can't answer this for you