Originally Posted by
thatguyusa Very simple APN settings manually turn thing on and off, to help the phone to interface. Carrier system updates allow the phone to do it automatically.
It's still not clear which mysterious 'carrier system updates' you refer to, which are supposedly different from APN settings that you get from the carrier, as long as you use a SIM card that belongs to that carrier, and regardless of your phone being locked or not, and that might get changed manually, or by the carrier from time to time.
But I suggest we end this debate, which doesn't add any value, and which may bore the others to death already.