Wireless customers who called too often to complain, fish for information about other customers, or otherwise take up the time of customer-care representatives at Sprint are finding themselves with a cancellation-of-services notice.

Sprint, the third-largest wireless services provider in the United States, with 53 million customers, started sending out termination-of-services letters in late June to 1,000 to 1,200 of its most demanding customers, according to Reuters news. The company waived the final balances on the cancelled accounts and gave its soon-to-be-ex-customers 30 days to transfer their phone numbers to other wireless providers.

“In some cases they were calling customer care hundreds of time per month for a period of six to 12 months on the same issues, even after we felt those issues had been resolved,” Sprint spokesperson Roni Singleton told Reuters, adding that the company is trimming its customer base to improve services (presumably to customers who spend less time requesting service).

Sprint wouldn’t say how often a customer can call before being cut off, and likewise preferred not to divulge what percentage of service calls the culled customers contributed to the monthly total.

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