Is the ZTE MC888 when provided as part of a Three contract, locked to its network? I need to help someone that is having a nightmare dealing with Three due to their poor network performance where the 5G device needs to be used, and I'm getting a Utility Warehouse Sim card to try in place but still waiting for delivery. Are the ZTE MC888 from Three normally locked? I was looking into getting a secondary device to test like the Zyxel NR5103E but that is quite pricy, even second hand, but it seems that model from Three is normally unlocked, right?























