I own Samsung Galaxy Note 10.1 NT-8000 and live in country where OTA updates are not available yet. Probably they will never be ;-) So I want to update FW manually through ODIN. I've read many how to manuals but still not sure if I upgrade new SAMSUNG FW in region where It is not still available will be still able to make calls and use data services. I will be upgrading last original FW by Samsung 4.1.1. Thx for any suggestions.
I'll start this off by saying that this is not the right place for chatting about this sort of thing, however will give a quick answer as this seems like a first time offence.
I would suggest having a look over at XDA for resources. Been there since the WinMo 6 days and has always been top dog for mobile hacking.
As far as I know from my days of plentiful I-9000 flashing, ROM's (the Android Bit) are largely independent from the Modem (The Phone Bit) and the Kernel (The low level hardware interface stuff). I would feel safe if I were you flashing an international rooted stock ROM for the EXACT model number as yours. Just be sure to back up all your apps with something like TiBackup.