I have tried flashing an XXEMG4 modem onto it and unfortunately hasn't made any difference. My IMEI is currently posted as one of the generic 0049 numbers when *#06# is dialed.
As far as I can tell, my best bet would be finding a way to get the serial port working through NVitem_reader_writer, as I have generated my correct IMEI file to add to the phone, but it won't successfully switch to RMNET + DM + MODEM to be able to connect to my computer in that way!
I am trying the same, changing imei by using nv items reader. I have the problem that i got a phone from a friend that has a 0049 IMEI, I dont know what he or someone else did to that phone to kill the imei.
The phone: Galaxy S3 I9300
Buildnumber: JSS15J.I9300XXUGNG3 (Android 4.3)
Rooted with Odin using CF-Auto-Root-m0-m0xx-gti9300
I am stuck at the same part, i cant get the phone in rmnet + dm + modem mode. what I did is: *#0808# - tip "RMNET + DM + MODEM" - tip "OK" - it says "8 saved!" (but it is not saved, when i go into the *#0808# it switched back to MTP)
When i do this when the phone is connected to my computer there is an unplug sound and a plug sound. So I think the phone tries to get in RMNET + DM + MODEM mode but it does not get it. I can activate all other Modes shown in this menu, only the one i need does not get activated.
What can I do to access this mode?
Thanks for your help in advance.