I have iPhone 4 which currently has SIM lock. However, a law passed in my country requires my service provider to disable the lock free of charge. However, I have no idea how this is done in practice - Google only gives me guides to remove the SIM lock after jailbreaking and such.
Of course, I can simply ask my service provider what to do, but they are professionals when it comes to being unhelpful and misleading when it is in their best interest, so I'm trying to ask here first.
Other phone users (not iPhone) I asked said they only had to insert a code given from their service provider. I see no place in the iPhone where such a code can be entered. So, if there is such a place - where is it? If not - how can I remove the SIM lock with most ease?