While Clearwire announced the addition of 1.23 million new subscribers last quarter, the company's quick expansion has come at significant financial cost, their debt burden resulting in a 15% workforce reduction and streamlined marketing efforts. The company today outlined plans to sell roughly $1 billion in debt to help continued network expansion, as the company pushes into major networks like New York, Los Angeles, and San Francisco. Some analysts are complaining that this was among the more expensive options, which also included selling spectrum or getting a long-rumored investment from T-Mobile (Sprint's supposed preference). The fiscal particulars:Clearwire's head start into the "not really 4G" market has quickly eroded with Verizon's upcoming LTE launch. Some analysts estimate that Clearwire will need an additional 3 billion to complete their network build; more if the company plans to shift to a dual WiMax/LTE deployment. Meanwhile Sprint and Clearwire's relationship continues to be strained, and we're hearing chatter among Sprint employees (which we've been unable to confirm on any official level) that despite statements to the contrary by CEO Dan Hesse, Sprint will begin an LTE network build next year.