Samsung Galaxy S5 comes with a feature called Download Booster. What is basically does is that it combines Wi-Fi and LTE to substantially increase download speeds when a file larger than 30MB is being downloaded. It was previously reported that Verizon and AT&T blocked Download Booster on their Galaxy S5 variants. As it turns out the feature exists on their variants, its merely been hidden. So its possible to activate download booster on Verizon and AT&T Galaxy S5.
In order to find the settings which toggles Download Booster users need to first download a third party launcher that can add system shortcuts, such as Nova. After that a system shortcut for the feature has to be added, which also creates a new icon in the status bar. However it looks like the good news stops here. Even if Download Booster is toggled on it doesn’t seem like its having an effect on download speeds according to multiple XDA forum members.
Though apparently if a single line of code is changed in the system files, Download Booster can be unleashed on these variants. But it is not possible to do that right now since there’s no root exploit available for Samsung’s latest flagship. It is only a matter of time until someone releases a root exploit, these things usually don’t take much time. So if you purchased a Galaxy S5 from AT&T or Verizon, fret not, soon you might be able to get the feature up and running.