Nights at 6
Sprint Website
A two-year Sprint PCS Advantage Agreement is required for Sprint PCS Fair & FlexibleSMPlans and Nights starting at 7 p.m. A one-year Sprint PCS Advantage Agreement is required for all other plans.
With no other plans being offered (Free and Clear ) it appears that way to me.
Any FF plan requires a 2 year agreement. Any plan with nights at 6pm or 7pm require a 2 year agreement. All Family plans require 2 year agreements on all lines. all regional and local only plans requite a 2 year agreement.
I may have missed something but I doubt it.