How to factory unlock iphone 4s 6.1.3?

I've tried factory unlocking an iphone 4s i bought off someone cos when i tried activating the phone it wouldn't work with my sim, so does anyone know how to factory unlock it for free when its not activated yet?

Jailbreak… Then get cydia… Then get unlock app… Pop in sim… Have beer… Enjoy

I would suggest you to use Remote unlocking service to unlock your iPhone 4s. It is more secure than other unlocking methods. It is available at Unlocking4u.com.

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