According to a report by CNet, Sprint Nextel is working on its own Long-Term Evolution network starting in early 2012. The deployment of a 4G network will be critical if Sprint is to grow as a competitor to Verizon and AT&T, both of which have a more robust LTE infrastructure. The upgrade would also replace inferior equipment that could end up saving the company $11 billion over seven years. Read the full article at CNet.com