Landline phones are an example of centralized infrastructure. You don't own anything but your phone, and the landline company owns and manages the rest, and you

Landline phones are an example of centralized infrastructure. You don't own anything but your phone, and the landline company owns and manages the rest, and you can be cut off at any time. Landline vs. mobile isn't as different as you might think. The business model is the same (monthly subscription). The only difference is the lack of being physically tethered to your voice connection and of course the addition of data services.