How to choose the type of network connection?

Question

Computer networks

Hello. I live in a private house, so the only available Internet connection technology is ADSL, fiber is not cheap. Now there are obvious problems with the Router, and I already went to the store and was about to change the tariff plan, as I realized that perhaps there are better options.
In general, the list of questions that have arisen:
1) Does it make sense to connect a tariff plan, say, 100 Mbps, with "I'm not sure that the following term will be used correctly, but the essence transmits" ADSL bandwidth, in the order of 30 Mbps.
PS Somewhere a very long time ago I read about how the speed is divided, and I thought that it would be better for me to overpay 150r / m for the fact that when dividing, my speed will always tend to 30Mbps, rather than save them, choose t / n with speed of 30Mbit / Sec and receive an insignificant part from it. If this theory is correct, then the choice is obvious, I hope to wait for the reasoning.
2) Perhaps now it would be better to use a pure 3G connection (Or there is already 4G, it seems the network is growing actively) and get more speed, but will it cost much more to distribute this 3G to the whole house
In general. I am looking for the cheapest option to get as much internet speed as possible.

Answer 1

1) If the provider promises you 100, and theoretically the ADSL limit is 30, then .....
This cannot be. You misunderstood something, you read the terms wrong.
2) What is "speed divided"?
3) 4G, if everything is fine with it in your region - really faster. Much.
But more expensive.
If you download torrents, then 4G is not an option.
If you just watch movies online, then 4G is quite an option.
But it will be much more expensive than ADSL.
There is an exception - take TV-services from the provider itself.
Why do you need fast internet?
What exactly are you missing?
Write on the Toaster?