Is there anyway to unlocked the 4S?

I just bought Iphone 4s from my friend recently cuz it sold me cheap and i want to update my ios to 6.1 or 6.1.2 but i see no unlock for it ( mine currently 5.1.1 ) i found some website but it needs to pay but i don't want to so any other way?

Added (1). What if the phone already unlocked with ios 5.1.1 but i want to up it to 6.1.2?

Free unlocking is not possible to unlock this high end phone. You need to pay to unlock it from current network lock. To unlock it use remote unlocking service. Buy the service for your Apple I-phone 4S from the site http://www.unlocking4u.com/apple-iphone-4s/rs6wp9/ and unlock it from service provider lock. Then use with any GSM network sim card. Check whether unlocking service is available for your I-phone 4s country and network it is locked now. Then if it is available get it and unlock it.

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