Well it's my first time reading or knowing such information that a network provider would disconnect you because you are using too much data plan

What i know about All those network providers you mentioned are just phone maker,I don't know they are network providers

There is nothing like that here in Nigeria,we have network 4 popular network providers here which are: mtn, glo, 9mobile,airtel. You will need voucher which you will load to your line if you wanna call and if you wanna browse you will need to buy data plans,they got different types of data and different type of plan for calls too, it depends on the one you will prefer and once your data if finish you will have to buy another one to contact browsing,they don't disconnect you because you use too much data, you can use it anyhow you like . There is night and day plans so you subscribe anyone you prefer

Also we got modem here and got plans too, there is mid-night plan and there is day plan so you choose anyone you like or useful for you . There are mini pocket modem and there are big ones using at stores or company.

There is nothing called unlimited here,once it finish you have to buy another one