I had my Samsung Galaxy J7 refine (SPRINT) Device connected Until I ordered & Switched over to My Current Device Tribute Monarch. (Tmobile) but im not satisfied with how the Monarch functions so i tried to switch back to my old device Samsung J7 refine and it says that the device is not compatible with tmobile network. I tried unlocking my samsung device and you guys said you can't do it because it wasn't activated for the 12 months. So boost mobile needs to get something done because i can't switch over back to the Samsung and i cant unlock sim UICC.. If this problem doesn't get fixed someway im done with boost mobile and i will DEFINITELY MAKE SURE MY BOYFRIEND AND HIS FAMILY PLAN ALSO CHANGE CARRIERS for good ive gaven you guys the benefit of the doubt but this !! This is not Okay with me..