Sprint Galaxy S6 (3rd party unlocked) PRL hack or method to force roam

A

AC Question

I have a Sprint Galaxy S6 that I unlocked via a third party company and debranded but still use it under sprint services. I have terrible service where i live and work to the point where i only have 1 to 2 bars of 3G. Is there a PRL hack available to force it to roam on like verizon towers or any other solution to force it to roam perhaps another way besides PRL?