[Q]LG G3 (d850) OTA in Europe?

Hello, i got LG G3 (D850) and i havent got OTA actualization because i live in Europe. How can i get OTA actualization from LG?

1. If i unlock bootloader the D855 stock will working on D850?
2. If i buy AT&T SIM CARD prepaid will i get OTA?

Please help me.