Restore IMEI in the SGH-I747

[hved13]

Hello! Help is needed!
SGH- I747 Android 4.4.2, I747UCUFNE4 without the Russian language.
4.4.1- sews through ODIN, the error came at the end of the firmware and the phone will not boot.
Then set 4.3, everything works, except for cellular communication, IMEI - zero \ zero.
Question - how to restore IMEI or will only service center?
Thank you in advance for your help.
P.S. English is not my language, sorry for the spelling.

 

[hved13]

Installed home modem, which originally stood, and restore IMEI. But the phone is not registered to a network, it requires PIN unlock network, although firmware, worked in our network.
Question - how do now unlock?

 

[audit13]

So the phone used to work on your network and now it doesn't? Is the phone asking for a code to sim unlock the phone?

 

[hved13]

So the phone used to work on your network and now it doesn't? Is the phone asking for a code to sim unlock the phone?

Hello! Before flashing the phone I worked in our network, and now writes - "SIM network unlock PIN". It is necessary to Android 4.4.2
It Fixable? I read that you can remove the unlock through Android 4.1.1, but it does not put.
Thank you for your response.

 

[audit13]

Once the phone is on 4.4.2, you cannot unlock the phone for use on other networks unless you can get a code from AT&T or buy a code.

 

[hved13]

Once the phone is on 4.4.2, you cannot unlock the phone for use on other networks unless you can get a code from AT&T or buy a code.

OK. Thank you.