Foreign SIM doesn't prompt for unlock code -- how to unlock?

[androidapple101]

I have a at&t Samsung Galaxy S3 sgh i747 that is locked, and I want to unlock it. But when I insert a foreign SIM (from AT&T) I get no prompt for an unlock code. Instead it just says "No SIM card. Emergency calls only.. I've also tried to enter variations of the *7465625* code, but they do nothing at all.

 

[mhinc]

I sent you a PM

 

[rheidzan]

I also need help with this issue. Can somebody help please...?
Mine is locked to ATT.

Thank you.

 

[mohd mian]

Hi I have same issue, Have samsung S3 I747 AT&T , want to unlock, when non att sim inserted, it won't ask for "unlock code "..
simply says, no sim installed , emergency call only ? can you help possibly to prompt the galaxy for unlock code?

thanks boss

 

[GSDer]

I'm no expert in this area, but from what I've read you just need to contact your carrier and request an unlock code. As long as your account is in good standing they shouldn't give you any trouble with that.

Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM -0.001 using Tapatalk 2

 

[bilahm]

same issue.

 

[KS Majic]

I also have this problem Were i Have a Moro Z3 Locked on Verizon i pursed that i want to use on AT@T and it does not prompt for a unlock code witch i have ( i put the new sim in and it just says "UN authorized Sim"). Can any one please help would like to give it as a present on Christmas