[Q]Galaxy S3 Not Reading Sim Card? - Galaxy S III Q&A, Help & Troubleshooting

I have the international GS3 and got it unlocked with a code and it worked fine on Orange network, while the phone is on Three, so then i flashed Omega 7 and rooted and it will no longer detect the Orange network, its just a circle with a line through on the status bar.
I thought maybe it wiped the unlocked but checked and it still says the phone is unlocked so i thought i would test and put back in the Three sim and it worked fine and then i had a old pay as you go o2 network sim and put that it and it gets a signal and the option to top up.
So i thought maybe the sim is faulty, and put it into my iPhone 4S and it gets signal and reads it, i followed the instructions and revered back to Stock to see if that fixed it but still the same problem.
Anyone have any ideas why or how to fix this?

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Check your IMEI number
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How would that help?
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If your phone lost it's IMEI number, it will revert back to a default-number.
Some networks still accept the phone with that number but most don't.

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Just checked with the three card in usig *#06# and a imei comes up so it can't be that or should I t do it with the not working orange card in?
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IMEI is your device ID. Does it match the IMEI-number on the box or under the battery of your phone?
If not, you're on a generic one.

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Yep its the same as the one on the box. I hm
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Try another Sim and also check the Sim is locked into the receptacle properly.
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I've tried two other network Sims and both work as well as the orange Sim works in my I phone.
Weird thing is when the orange sim. Is in the phone it shows the apn correct for orange but I just get the circle with line through where the signal should be.
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CSC includes Orange ????
Network settings entered manually if not .
jje

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Your SIM might be locked to your iPhone's IMEI or does it work in other devices?
I've only heard a few reports of such practices and none so far with Orange (regardless of country)

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As above....check apn settings

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I checked apn under three and the orange wasn't there. I put in orange sim and three apn is gone and orange are there and the correct settings but still the same stop sign looking symbol where network signal should be.
Not sure what csc is.
It worked before in the g3 before I flashed to the omega rom so don't think it could be locked to a phone
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phone's imei doesnt match true imei
hello,
what does it mean that the imei given by the phone doesnt match the original imei written on the back of the phone?

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If for some reason the rom you put on your phone screws up the IMEI and replaces it with a generic IMEI you now have a different IMEI than before. This was happening with the SGS2's a while back when flashing certain roms... Was fixed pretty fast and haven't heard about it happening again BUT there's always a chance and no guarantees...

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Is there anyway to fix it back without any backups?
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It's actually happening quite a lot with the S3, especially the US-versions
Some people have claimed it to have been fixed when flashing a Stock ROM through Odin, but should it not be fixed then you'll need to have it repaired by Samsung.

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darlidar said:
Is there anyway to fix it back without any backups?
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Click to expand...
Click to collapse
There have been a few users claiming to have fixed it without Efs backups in the sgs2 forum (from fading memory). Have a search there, as any method will /should be similar
Worth a search/try, or as posted above, will need to return to Samsung
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Use "k-tool" to backup your imei and keep it in a safe place(upload to dropbox and PC) and use APN manager to backup apn settings. Btw is a brilliant app to have when traveling
Edit:u can recover your missing imei nr. But be sure to have the original efs folder,especially NV-data.bin most not have tampered with

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d4fseeker said:
It's actually happening quite a lot with the S3, especially the US-versions
Some people have claimed it to have been fixed when flashing a Stock ROM through Odin, but should it not be fixed then you'll need to have it repaired by Samsung.
Click to expand...
Click to collapse
i have the same problem
brand new phone
don't recognized the sim card , try few
euro model , factory unlocked
how can i flashing a stock rom ?
thanks