Cox starts charging $50 extra per month for unlimited data

Cox is now charging its customers $50 extra each month for unlimited data.

Cox also introduced a $30-per-month charge that adds 500GB to the standard 1TB data plan. Cox customers who go over the 1TB cap without having purchased extra or unlimited data pay a $10 charge for each additional 50GB. Naturally, "unused data does not roll over," Cox says. Cox, the third-largest cable company in the US after Comcast and Charter, has about 6 million residential and business customers in 18 states. It has rolled the data caps out on a city-by-city basis, so not all Cox customers face the caps yet.