I tried to activate a Gophone sim card on AT&T website. On the next page to the page which I inputted the ICCID number of the sim card, I inputted a postal code. But the page displayed this error:
Check Activation Status
Activation Status
GP419: Please enter a ZIP code that matches the associated city/state.
Please enter the service ZIP Code you used when you began your activation.
I inputted some postal codes, but same message was dsplayed.
How should I do to fix this problem?