I bought my iphone 5 from apple at Christmas and it said unlocked?

I've been on a orange sim only deal since I got it and my contract runs out this month. I want to move to 02, so will I be able to buy another sim only deal or will I need to unlock it again? I bought it unlocked so will it be now locked to Orange since I'm on orange?

Since it's unlocked all you need is another SIM card. It would be a good idea to check with 02 to make sure that they are using compatible bands, but 99% chance it's going to work fine.

If like the states, unlocked once is unlocked for good. SIM does the carrier tethering. Shouldn't be a problem. Best luck.