I have iphone 3gs locked and i want use airtel sim card in india?

I have iphone 3gs locked and i want use airtel sim card in india?

Which Network locked in your iphone?
You can unlock your iphone 3GS from Network lock using Remote unlocking method. Which is the safe and secure method to unlock iphone. To get this service visit http://www.simpleunlocking.com/apple-iphone-3gs/rs16wp9/ here they ask your country, Network name to which it is locked, IMEI number of your iphone. Here they unlock your iphone using latest versions of iTunes software. And you can get free unlocking instructions from the site http://www.mobileunlockguide.com/apple-iphone-3gs