Sprint Nextel Corp. (S) agreed to acquire affiliate iPCS Inc. (IPCS) for $426 million, the last of the major independent affiliates of Sprint, as the deal will also end a legal battle between the companies.

IPCS had been arguing that Sprint's 2005 acquisition of Nextel violated an exclusivity agreement with iPCS, which is the Nextel affiliate in the territories in which it operates. IPCS has some 700,000 customers in a territory that covers 81 markets in seven states.

Sprint announced plans in June to sell network assets in several Midwestern states to comply with an Illinois court ruling to divest Nextel assets as part of the iPCS spat. That plan is now off in light of the acquisition.

Under the agreement, expected to close late this year or early next year, Sprint will acquire iPCs for $24 a share, a 34% premium to Friday's closing price. News of the deal sent iPCS's shares soaring 33% to $23.75 in premarket trading. Sprint dropped 1% to $3.43.

Sprint will also assume debt of $405 million in the deal, which also smooths the way for Sprint to sell both Nextel services and WiMax, which iPCS was also suing to block, in those territories.

-By Mike Barris, Dow Jones Newswires; 212-416-2330; mike.barris@dowjones.com