How do I unlock my iPhone 3GS from Orange?
I have an old iPhone 3GS that's locked to Orange and want to unlock it so that I can use a local sim card when I go travelling in Zambia. I no longer use the phone as I upgraded to a 4S 1 year ago but I'm still with Orange.
Is there a way of doing this for free?
iPhone 3GS, iOS 6.0.1