P905 International Version, GSM works only, not registered network issue on LTE

[nowheretohide]

Hi all,

I was using my P905 international version with LTE before my EU trip.
In EU, I lost the 4G connection in roaming. When i came back to home country, i found out LTE is not working, when i attempt to make a call, i get not registered network message and lose connection.

But I have phone function and EDGE internet in GSM only mode.
IMEI number is correct, and it is same as original.
Try to solve problem, I made factory reset more than 10 times. I installed Hong Kong, Taiwan region roms Kitkat and Lollipop, even Lineage os from here. But no luck, no LTE anymore.
When i play around with *0011# and Q > 0000>UE Settings & info > setting>Protocol>
I receive 4G connection for a while then I lose it again.

I tried Auto/Manual Network Choose too, nothing works but GSM only.

I checked EFS files, everything seems correct, no corrupted file there as I understand.

Do you guys have any idea how to solve LTE connection problem?

 

[nowheretohide]

I think i found a solution. Not sure.
I download the CP / MODEM file from following link.
https://zfirmware.com/samsung-galaxy-note-pro-12-2-p905-repair-firmware/

I made hard reset from the system. I delete user files and reinstall it.
4G and 3G came back. Now it is connecting to 4G and can make phone calls. But the connection drops after 10 mins. I need to turn off mobile connection and reconnect it. It connects for few minutes or never.

I need to restart the device and getting 4G or 3G connection for a while again.
When it connects to 4G or 3G, if it is stable connection, I can make phone call too and does not receive not registered on network error.

Should I install Stock Rom again? or try to play with some config files?

Do you have any idea?

 

[nowheretohide]

no idea?

 

[nowheretohide]

is there anyone has nv_data files in EFS folder? I think mine is missing.

 

[dannyt84]

Hi, I have the same problem.

 

[nowheretohide]

Hi, I have the same problem.

did you try to do anything?

 

[nowheretohide]

we need help here. Is there anyone can help us?
I do not want to give up with my P905.

 

[nowheretohide]

no help?

 

[nowheretohide]

do you have any idea to have stable 4G? Only LTE mode is not stable. I tried. Now GSM/WCDMA/LTE mode is running but, LTE is dropping very often. I get stable connection with other Samsung Device.

 

[nowheretohide]

as i see, there is no help. I am changing to T835 256gb LTE version.