Wouldn't it be much more efficient to start a telco with just 1 plan: unlimited everything for a fixed price.
Literally just charge $30/month or so (I haven't done the math on what is economically viable) for a flat fee plan. No strings attached, except maybe rate limit after a substantial amount of data to prevent abuse (like 50gb/day).
Also: no contracts, let people cancel when they want. And don't sell devices, just the SIM card.
This way you'll have:
- no need for usage metering systems
- very simple billing systems
- minimal need for marketing
- much less support calls (at least no angry customers due to unexpected costs)
- a very simple self-service portal
Now, I know I'm being naive here, it'll be next to impossible to start a service like this because the physical infrastructure (the base stations) are owned by the ancient behemoth telcos that have roamed the earth for past century.
But just imagine how great a telco can be if you were just to trim the fat, legacy and greed away.