[General Questions and Answers] mcaustria:
Note 2 LTE - suddenly sim locked again ???

hint: only read the Bold letters to make it short

ok, im allmost ready to give up this time...dont know how many of these threads i read allways to find a sullution to my problem, but it seams i finally have to ask for help myself.

Yeah, this is my first post, but ive been arround for a while, anyway this time, i need your active suggestions...

the History:

The phone: Samsung Galaxy Note2 GT-N7105 LTE ( t0lte ): initially locked to the Austrian Carrier A1, but i bought it allready unlocked.

Back then 2013 managed to flash and root via clockworkmod and wanam light rom, without triggering knox - thanks to you guys in here...chears again for that...

I hardened the system quite good and gave it to my mums - not touching it for years -or hardly, finally 2016 seamed to be time for an update. Didnt care much for the knox anymore and simply updated recovery to TWRP 3.0.2 and cyanogenmod 13.0 - 20161118-NIGHTLY ( recconed simplest Marshmallow upgrade ), installed the basics - thats it - left the phone with my mum again.

Got back few weeks later - i had realized my mum wasnt reachable on her phone anymore - figured she could still make calls herself, strangly she even would still be reachable when called via landline , but for some reason not from any cellular networks - so i went for a visit and thinking it might simply be a problem with her sim - i swaped her sim for mine - when turning the phone back on it now asked me for an SIM-unlock code...WTF!!!:confused: (and befor anybody asks my mums sim network was never A1 either)

- everything else seamed fin - imei and baseband still ok, sys stable as far as i could tell - only thing i noticed it had updated cm-13.0-20161122-NIGHTLY on its own...

Swaping SIMs didnt yeald any effet - so since that was the only thing that caught my eye i reverted back to 20161118-NIGHTLY and then back to my old wanamlight and finally even to original stock rom - problem persisted.

Searching i found 100 links like How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting) , but no luck

Final resort, i even purchased an unlock code from UnLockBase but even that didnt work ...WTF!!!:confused:

So back to square one i found this Baseband Unknown and IMEI Null NOW WORKING | Samsung Galaxy Note II GT-N7100, N7105

But even if my imei and my baseband was ok i thought perhaps the efs migh have some taken some kind a hit - so i searched eveywhere and found my old 2013 backups: PIT-File and EFS-partition (DDed via terminal) - so i backedup the existing efs and restored the old-EFS-Backup back again - then i even used Kies to revert everything to the last bit.....but no luck....

..also UnLockBase-Code still doesnt work - (btw. the also provide an unfreez code but ...all the same ) so i rooted again and tried GalaxSIM unlock says unsupported Model....whatever!???!!!:crying:

only thing left is perhaps: buy a cheap mainboard via aliexpress and perhaps take allong the imei from the old motherboard...

but i hate giving up!!!

What do you guys think? ...any suggestions

...sorry for having to read all that...tried to help a little there:p

update: made a second thread in the N7100 forum part link