I had my contract phone stolen so in between getting a new contract phone I bought a temporary phone as I still had 2 months left to pay on contract, but still used orange and my same number. I now have a new phone and contract still with orange. The temp phone I bought I am now going to sell, will it be locked to orange??
I would assume that it would be locked, but not 100% sure ........ easiest way to find out, would be to put a non-orange sim card in your phone and see what happens.