The port was created by XDA Forum Member boringalex. (xda-developers.com)
A user on XDA forums came up with a solution to enable the Download Booster feature on the Verizon and AT&T Samsung Galaxy S5. (techtimes.com)
In case, if there are any issues or you need more information / support then head over XDA forums threads for Samsung Galaxy S4 here or HTC One here. (gadgetguide4u.com)