They’re actively blocking North American and international iPhones from connecting to their Network. Apple has updates for each region that automatically download when you get there, but they’re claiming it’s a trade secret so only the phones they sell can get that update that’s made by Apple for them. It isn’t even a firmware update it’s a little app that downloads in the background. Google does the same thing with Android, the pixel line, and anything running the stock with Google services or pixel experience.

They also refused to use the standard voice over LTE and refuse to let any thing that they didn’t sell try to connect to their voice over LTE even if it’s compatible. Leaving restricted Apple from enabling voice over LTE for iPhones not from Australia even though it’s just a software update that you need that doesn’t run on the firmware level.