Sigh,

So, my Galaxy S4 had an issue, it is fixed now.
In the description of repair information it says "boardswap'.

Now, this annoyance you'll read started to occur now that I have it back, never happened before I sent it in for repair.

But now it is asking for an 'Unlock-PIN SIM-Network'.

What do I do now?

And I should add that when I bought this phone it said in the description "Unlocked", I don't know if it has anything to do with it.

I tried my PIN, my PUK, and some 'standard' codes like 1111 etc but none work.