As promissed, new Sprint MVNO RingPlus opened signups for its free ad-supported mobile service promptly at 8 AM PDT today.
Update 8:45 AM: Well that didn't last long! The free promotion is now closed. Any readers get in?
The free plan is limited to an unspecified number of signups and could end at anytime. If you miss out on today's promotion, free plan signups will reopen Friday Sept. 6 at 10 PM PDT.
The promotional free plan is only available if you "Bring Your Own Sprint Phone" (BYOSP). RingPlus can activate most clean ESN Sprint or Sprint MVNO phones with the exception of iPhones and possibly BlackBerrys. To sign up for the free plan go to my.ringplus.net/device_validation_requests/new.