HELP - Android Q&A, Help & Troubleshooting

I Accdidently ticked the clear EFS in odin. Now my phone does not recognize the sim card. The IMEI number ia null and the baseband is also unknown. ??
Anyone who can help?
My device galaxy J200G
Firmware version J200GDCU2APL6

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hello , sorry for my english. i have one s2 and dont recognize my sim card (is not locked) and when i press *#06# say imei null/null
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[Q] Unknown Baseband and IMEI on G850A (AT&T)

Hi,
I got this phone from a friend and I don't know the history of it but is unable to detect any SIM card and the Baseband and IMEI appear as Unknown.
Do you have any idea on how to fix it?. Thanks in advance.
i had the same problem on 850FQ i bought few days earlier.
I digged deeper into the Issue and found out when someone wants to unlock their phone it can be done by 2 ways ONE: with an unlock code which people can buy from many online sites TWO: Using some hardware device i dont know its name. The repair guy told me sometimes a phones IMEI is also changed during the unlocking process and if the process is buggy then it may also damage IMEI AND BASEBAND.
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Try a factory reset without simcard inserted, see if the imei comes back. if not you may sell it as a demo unit or keep the device for camera and music needs
adolfo7x said:
Hi,
I got this phone from a friend and I don't know the history of it but is unable to detect any SIM card and the Baseband and IMEI appear as Unknown.
Do you have any idea on how to fix it?. Thanks in advance.
Click to expand...
Click to collapse
maybe your phone is locked to provider(AT&T verzion...) i dont know,also I cant find proper 850A firware on sammobile or other sites
مشكله في جهازي تغير رقم imei الي (004999010640000) جلاكسي sm-g850f الأصدار 5.02
Problem in two to change imei number (004999010640000) Galaxy sm-g850f LAUNCH 5.02
I have 004999010640000 imei and I want to restore my original imei but it seems I don't have a backup. Any solution for this?

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