In Reply to: I am on 3 and to my knowledge posted by Tuberose on Tuesday, 12. June 2007 at 14:03 Bali Time:
I was talking to a person at 3 on Saturday about changing from my current provider to 3 and asked that question. You cannot unlock your phone from 3 and you also can't but a 3 sim card into any other phone other than a 3 phone.
Basically if you have a 3 phone you are locked into using their sim card or nothing.