If i bought a IPhone 5 from apple?

I bought a unlocked iphone 5 from apple and put a orange sim only sim card in for 6 months and now its finished. I was wondering can i put a sim card from any network now or is it only locked to orange now?

You can put any sim card in as it is still unlocked to any network

Yes you can use any carrier that has SIM card that's why it's called unlocked.

Its Unlocked for good.

I got mine from apple and if bought from apple you can put any sim card you like in there as the phone will not be locked to a network.

It will remain unlocked to any network.

It's only locked if you purchase the phone from the network.