AT&T gave me the unlock code for my device, but it doesn't work. I get an error message that says "network unlock request unsuccessful". I've spent quite a bit of time on the phone with customer service and we've tried several methods and none have worked. CS then directed me to take the phone to a store so they could unlock it there - that didn't work because nobody there knew what to do. I called CS again while still in the store and the worker spoke to them & got the same results. I was then directed to take it to a device support center & got the same results there. Any advice?
Hi, I have similar problem where the unlock code given by ATT does not work. Had confirmed at least 3 times. Per suggestion from ATT CSR, I had reset my Samsung Captivate to manufacturing setting and tried to unlock the phone without sim card by using code #7465625*638*Unlock Code (NCK)# and *0111Unlock Code (NCK)# and got message "Not Registered On Network". Any suggestions to fix this problem are greatly appreciated. Thanks.