So starting August 24th, if you upgrade a dumb phone to a smart phone on a legacy Verizon plan (non share/more everything), you will now have to keep the data plan on that line for the duration of the contract. Even if you change the phone on that line to a dumb phone.
Internal Memo:
Source:
http://www.droidforums.net/threads/...unlimited-data-subscribers-on-verizon.272480/
Internal Memo:

Source:
http://www.droidforums.net/threads/...unlimited-data-subscribers-on-verizon.272480/