And what do you propose would be such a reasonable rate limit? >However, even if we assume that SIM boxes are a magic solution to carrier interventions, that s

And what do you propose would be such a reasonable rate limit? >However, even if we assume that SIM boxes are a magic solution to carrier interventions, that still raises the cost from the current status-quo. Implement enough of these barriers and the entire scam operation becomes unprofitable and no longer worthwhile. Why do you assume that the call routing is a meaningful cost to these operations? For all we know they spend less than 0.01% of their revenue on call routing.