For new customers or lines, Jump on Demand was canceled a long time ago (at least April of this year as that's when I got my daughter a phone and it was no longer available). However, for lines you already have with JoD, you can continue to jump to a new device like before.
Basically, this is nothing new.
Sprint still has iPhone forever for all customers who choose a lease option, plz research before posting non-sense
This is a bit of old news. We at T-Mobile stopped offering Jump! OnDemand months ago in retail locations unless you were a current customer that was upgrading. It looks as tho it finally has been removed from online as well.