I would think they'd have to have phone in hand to tell if it's rooted. Don't think there would be a way to tell over the air. Unless someone sends back a rooted phone I don't think we have to worry.
After looking it looks like they are adding parts of Sprints T&C.
This is from Sprint's site. Sprint is probably just trying to have a uniform Terms and Conditions across all their Brands
Our Right To Suspend Or Terminate Services
We can, without notice, suspend or terminate any Service at any time for any reason. For example, we can suspend or terminate any Service for the following: (a) late payment; (b) exceeding an Account Spending Limit; (c) harassing/threatening/abusing/offending our employees or agents; (d) providing false or inaccurate information; (e) interfering with our operations; (f) using/suspicion of using Services in any manner restricted by or inconsistent with the Agreement and Policies; (g) breaching, failing to follow, or abusing the Agreement or Policies; (h) providing false, inaccurate, dated, or unverifiable identification or credit information or becoming insolvent or bankrupt; (i) modifying a Device from its manufacturer specifications (for example, rooting the device); (j) failing to use our Services for an extended period of time; (k) failing to maintain an active Device in connection with our Services; or (l) if we believe the action protects our interests, any customer's interests, or our networks.
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