U.S. wireless carrier Sprint Nextel's post-paid subscriber losses will continue to pressure revenue and cash flow despite growth in the pre-paid business. We are lowering the company's corporate credit rating to 'BB-' from 'BB' removing it from CreditWatch with negative implications. Even if post-paid subscriber losses abate and the company continues to right-size its cost structure, key credit measures are unlikely to improve in the near-term. The negative outlook incorporates the expectation for some moderation in post-paid subscriber losses, as well as continued growth in the pre-paid business. NEW YORK (Standard&Poor's) March 4, 2010--Standard&Poor's Rating Services said today it lowered its corporate credit rating on Overland Park, Kan.-based wireless carrier Sprint Nextel Corp. to 'BB-' from