Boost Mobile founder Peter Adderton is willing to pay up to $2 billion to buy back the prepaid wireless brand from Sprint Corp., he told Reuters on Monday, a significant potential premium to what satellite TV provider Dish Network agreed to pay for Sprint’s entire prepaid wireless business.

U.S. regulators approved Sprint’s $26.5-billion merger with larger rival T-Mobile US Inc. (TMUS) in July.

As a concession to regulators, the companies agreed to sell Sprint’s prepaid wireless business, which includes the Boost and Virgin Mobile brands, to Dish for $1.4 billion, as well as sell some wireless spectrum, or airwaves that carry data, to Dish for $3.6 billion.

The merger still faces a lawsuit by state attorneys general that alleges the merger is harmful to consumers.