Device can only boot into download mode I have rooted my Straight Talk Samsung Galaxy Grand Prime (SM-S920L) running with Android 5.0 and while trying to load TWRP recovery I messed up with my device and  now, I can only get into download mode.  It says "Set warranty bit : kernel". Samsung's website doesn't  list my device and it turns out to be a model Samsung makes for the TracFone network, so I am at a dead end.  Using Odin I have tried other firmware with no luck and Samsung Kies is also of no use.  

What can I do now to get my phone working again?
You need to reinstall the Samsung drivers from kies then go install odin on pc then download the stock recovery.tar it must be the .tar or it will not work with odin. Then open Odin on pc then plug in phone then click the AP button in Odin then select the .tar file and hit run. All is good.