> I wonder if an MVNO has local-level data to detect a situation like this when hundreds of phones are in one area and don't move

MVNOs don't care because they collect the profit without having to deal with any of the network issues. The carriers in turn only care when it impacts performance for legitimate customers, as they also see a piece of the pie.

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leakycap 3 days ago | parent [-]

> MVNOs don't care

This is an excellent point

I assumed there would be anti-fraud measures blocking this kind of activity, but if this is a paying customer it isn't necessarily fraud/bad to the carrier or mvno

	▲	toast0 3 days ago \| parent [-]
		It'd depend on the mvno and their costs, but if the user fees pay for the underlying costs, the mvno is making money, and their user numbers go up, which makes for happy graphs. They can also cancel or limit sims that do too much messaging or calling, which drives new user signups and makes more happy graphs. Doesn't really matter to them if all the abusers live in the same office. Increased volume also likely reduces their unit costs with the underlying operator and messaging/calling providers, so even break even abusers help their bottom line by increasing margins for normal customers.