we all know the new ios7 in the market, New ios7 iphone can be unlocked

only if you know the icloud account details or your iphone has never been to icloud

In all case its your responsibility to check before hand with your customer that [ HE/SHE ] must know the icloud details was using before unlock

For more info : http://support.apple.com/kb/HT5818

br.,
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