Clearwire got a last-minute reprieve Thursday after Sprint confirmed a rumored last-minute financing deal. The 4G service is getting both debt assistance to pay off its $237 million owed on Thursday as well as up to $350 million to help Clearwire transition over to LTE. Under the new terms, most of the payments will come during 2012, although Sprint now also has to guarantee use of Clearwire's outgoing WiMAX network through 2015 or later.