I was on Contract with 02 and have recently upgraded my phone. I want to give my old Nokia 6230 to my brother to use as pre-pay on 02. 02 say they don't lock their phones but whenever I put the pre-pay sim in I get asked for a security code. I've tried the standard 12345 and 0000 but they aren't working. 02 think I need new software from Nokia to be able to go pre-pay. Is this right or is there an unlock code I can use? The IMEI is 355009005745072.
