https://www.cox.com/residential/mobile.html
"MVNO agreement with Verizon"
"According to the court filing, Cox requested an RFP in 2020 seeking an exclusive mobile network partner. Both Verizon and T-Mobile made offers but T-Mobile’s terms were significantly more expensive. Cox estimated its offer from T-Mobile was “$90 million more expensive than Verizon’s,” the court said. (T-Mobile stated the difference was more like $23.8 million.)"