The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.NEW YORK ( Trefis) -- After months of postponment, Sprint ( S) finally gave up on its LTE deal with Lightsquared last Friday. Sprint had extended its Dec. 31, 2011 deadline to March 15 to give Lightsquared more time to secure regulatory approvals for its LTE network plans. However, the FCC said last month that it will not be able to grant clearance for the proposed network as it found potential interference issues with GPS receivers that could harm public safety. With Sprint's relationship with Clearwire on a much stronger footing now, it made little sense for Sprint to continue to hope for a Lightsquared turnaround. Instead, it can now give its own as well as Clearwire's plans to aggressively deploy LTE networks complete attention as rivals Verizon ( VZ) and AT&T ( T) continue to add more markets to their ever-expanding LTE footprint. .