These subscriptions are often perceived as “Flat” because, as long as you stay within the limits (included volume/type/geography), then you only pay the monthly fix cost for subscription, which means “flat rate”. Obviously, more volume included means higher fix cost, but less volume included also means higher variable costs because the exceeding consumption is billed per unit.
From the above diagram, we can see that, if you assign the subscription “NATEL go Global” to a person who uses little o no traffic outside of Switzerland, then you are paying almost 200.-/month too much, which means 2’400.- CHF/year.
On the other side, if you assign the subscription “NATEL go Swiss Premium” to a person who often travels abroad, then the variable cost for roaming traffic will probably be much higher than the 250.-/month of the “NATEL go Global” subscription.
Therefore, for each usage profile, there is an ideal subscription that generates the lowest monthly cost.
If you are choosing a mobile subscription for yourself, then even though it’s not an easy task, there is a chance you know what you need (your usage profile) and you know how to choose your ideal subscription. And since you keep an eye on your monthly invoice, you can adjust your subscription if you notice the choice was not ideal.
But how do you do that if you are working in a large enterprise and your role is to choose the ideal subscription for each of the hundreds/thousands of mobile users ?