How to unlock an iphone 4 that has io7?

When i was on my way to the train station last night i spotted a cracked iphone 4 on the floor its kinda messed up but i been wanting to get an iphone for a while now its an iphone 4 with ios7 i tried to unlock it by using methods that i've seen on youtube but nun of them have worked by the way the phone has no service does anyone know how i can unlock the the iphone?

Take it to a unlocking store, they will do it for cheap. Don't spend money online, its scam
but try putting a sim card if it works or not.

Firstly, don't pay to an unlocking store(!) to unlock your iPhone.
There's not an jailbreaking or unlocking method for iOS 7 yet, but it will release before 2014.So wait for a jailbreak-unlock
tool from Evad3rs or Redsn0w etc. And don't believe the jailbreak tools that their links are only on dailymotion.
Hope this helps and if helped, please choose as 'Best Answer'.

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