The man who helped get Sprint back into the positive with the highly prized HTC EVO 4G and soon-to-be Samsung Epic 4G has decided to leave the company to pursue other ventures with another one. Kevin Packingham, Sprint's Senior VP, was the man who primarily influenced the design of the HTC EVO 4G – which of course continues to be a strong sell for the company while at the same time driving subscriber growth. In the mean time, both network ops president Steve Elfman and product development VP Fared Adib will take on the position previously held by Packingham. His sudden bail will of course resonate throughout the company as some view his departure as a damaging blow for Sprint's ability to compete in the smartphone market. Despite his resignation, he is still providing one last parting gift for the wireless carrier with the upcoming WiMAX enabled Samsung Epic 4G – which will compete head-on with the recently released Motorola DROID 2. In any event, we'll see how Sprint will compensate for the loss – and whether or not Packingham's departure will ultimately prove to be detrimental to the company.