>>Interfaces are standardized and you can buy different components from different vendors.
You can buy components from different vendors, except that the overhead of working with thousands of different suppliers for your network is a non-starter, hence network operators around the world have moved to a model where they prefer large domain players to provide packages (e.g. 5G Access, 5G Core, 4G RAN, 4G EPC, etc.) to streamline purchasing, coordination, responsiveness and costs.
>>Operating services, network control, visitor and location registers, mobile switching centers, network monitoring, and rest of the software that deals with the core network can be bought from others.
Such extra components can be bought from others, except it should be noted that Huawei seems to provide very attractive prices for their "good enough" offerings in these other categories.
You can buy components from different vendors, except that the overhead of working with thousands of different suppliers for your network is a non-starter, hence network operators around the world have moved to a model where they prefer large domain players to provide packages (e.g. 5G Access, 5G Core, 4G RAN, 4G EPC, etc.) to streamline purchasing, coordination, responsiveness and costs.
>>Operating services, network control, visitor and location registers, mobile switching centers, network monitoring, and rest of the software that deals with the core network can be bought from others.
Such extra components can be bought from others, except it should be noted that Huawei seems to provide very attractive prices for their "good enough" offerings in these other categories.