[Q] "no sim" error on my other carrier, currently overseas can't make calls.

[sunnetchi]

[Q] "no sim" error on my other carrier, currently overseas can't make calls.

Hello everyone,

Long time reader first time poster because I have searched for the past 2 days to solve my problem but it is kind of an emergency at this point.

I am currently overseas, last year I was here I was running stock GB and unlocked the simlock by contacting AT&T and getting a code. This year I am upgraded to stock JB but I get a no sim error with my overseas carrier and the phone doesn't ask for code at all. I tried putting in the ATT sim again and that works but can't use it here because its too expensive. I have tried other people's sim cards (total of 3) all of them get no sim error. This tells me the sim lock is still on there but I can't do much since it doesn't ask me for code.

I have also flashed siyah kernel and paranoid rom since coming overseas still no luck. This was mainly because stock JB was horrible.

I tried galaxy s unlock app but won't see my internet connection, I am not sure if it would be able to solve my problem anyway. I can't try the paid version of sim unlock because I can't get it charged to my ATT bill. I heard there is a free version but couldn't find it after searching for hours, seems as the developer wants this to be paid anyway.

I tried choosing multiple carriers under network settings but no luck.

I am sorry if I missed something obvious. Seems like Kies\ATT messed up something while upgrading me to JB

I have contacted ATT to ask if their JB upgrade locking sim is a known problem but all I got was a "are you sure you did it right". I have an unlock code from ATT though, just can't use it because the phone doesn't ask for the code, just says "no sim, emergency calls only"

I have flashed different modems just to see if that would help, nope

I have searched and read every similar thread, I would search more but I really need to solve this quick. Sorry if I missed any details first time posting.

Thanks in advance.

 

[creepyncrawly]

Don't know if this will help since I haven't tried it, but I found this. Maybe this will allow you to enter the unlock code?:

If your Samsung is not asking for an unlock code and it only reads “Network Locked. Emergency calls only” or “Insert correct SIM card” you can use one of these two formulas:

#0111*UNLOCKCODE#

#7465625*638*UNLOCKCODE#

 

[sunnetchi]

hmm both of them gave me mobile network available error, weird I would guess it wouldn't check for that.

,just to make sure , I just enter these on the keypad and press call right ?

 

[creepyncrawly]

With that type of code, you don't have to press call. If it is supposed to call up a menu or dialog, it will do so when the last digit is entered. If the phone does nothing when the last digit of the code is entered, then it is probably a code that is not recognized by the phone. So I guess those codes don't work for the SGH-I777. I don't know if this is dependent on firmware. I do know that unlock doesn't work the same on Jelly Bean. I've read the unlock methods don't work. See here. I guess you could flash ICS stock plus root and then use one of these.

or... can you call or chat with an AT&T tech support to ask how to apply the code in your situation?

 

[sunnetchi]

I found a list of a lot of codes, tried some of the ones related to network lock, one of them asked for password, i entered it and it said unlock successful yet still not working. I just rooted to stock gingerbread still no sim error yet ATT worked and sent me a text for international rates.

I just don't know what happened whist upgrading to JB.

 

[zebra72]

I have a similar problem where my unlock code that used to work no longer works. Just out of curiosity, does the Serial # shown by GalaxSimUnlock app match the one listed physically under your battery? I'm not aware of how to check for the serial number other than that app. On mine, I noticed it got zero'ed out, and if my hunch is correct, I think the unlock code recognized by the phone is based on that serial number (among other things), so the one supplied by AT&T won't work anymore. I'll have to get a new number based on that zeroed out serial number or change my serial number somehow.

 

[sunnetchi]

Sorry I flashed another rom already but I will try to reinstall everything and check later today. Idk if the app works with gingerbread, it should.

 

[zebra72]

Yes, it works with Gingerbread as I was able to use it. I was hoping that if I restored to Gingerbread, my serial number would come back. But no dice. I'm really curious to see what your serial number is.

 

[sunnetchi]

just tried to check but the app keeps crashing on mine. I tried with anothe unlock app i got undefined under serial.