great product but i have some trouble with the head phone port

ok, if you are like me and have already unlocked your iphone but now cant get any internet covrage outside of wifi, you are probable pretty mad. But i have the solution, its called unlockit.com and it will edit the apn code so you can use the cellular data network all you need to do is visit this link on your iphone http://www.unlockit.co.nz/ and follow the instructions, here is a link to a video that may be a little help, its pretty bad quality wise but i think it could give you an idea of what you have to do