Sprint will end its current port credit promotion more than a month and a half ahead of schedule. This past May, Sprint kicked off a promotion that offered up to $125 per line for new subscribers who ported their service in from another carrier. Customers purchasing a feature phone and porting in a number receive $50 per line as part of the promotion, and new customers purchasing a smartphone, netbook, notebook, tablet or mobile broadbrand device and porting in a number receive a $125 service credit per line. This enticing promotion was scheduled to run from May 4th through October 1st of this year, however BGR has learned from a reliable source that Sprint is ending the promotion early. Tomorrow, in fact. Interestingly, Sprint retail locations will no longer offer or advertise the promotion, but they will continue to honor it through the original end date. In the event that a new customer already knows about the promo — and only in that event, we’re told — Sprint will honor the deal and dole out the associated credits. With that in mind, those looking to move over to Sprint for one of its great new phones like the Motorola PHOTON 4G should be sure to mention the promotion when making a purchase at a Sprint retail location, as the promo will no longer be offered up willingly starting tomorrow.