I read in the Singapore hardware zone forums that they too had ths problem with the LTE version. With the latest March (Singapore is one of the first to get it), the problem was fixed. They were able to fix it with an OTA update. So my advice for now is just hang in there untill the update arrives. I for example just returned my unit and waiting for the update.
I have the same problem with mine, Italian Note Pro LTE. After the first OTA the status changed to Modified. I have also tried with ODIN to reflash, but it is still Modified. Obviously the Note Pro has not been modified or rooted in any way.
It seems a common problem.
The problem will persist. Wait for the update to be fixed with an update from Samsung.
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