If you want unlimited minutes you should get either the $55/month Beyond Talk plan or the $40/month payLo plan both with unlimited domestic minutes with any phone within the USA at anytime.
All the other Beyond Talk and payLo plans use anytime minutes. Minutes are used anytime your phone is used for any call. 911 and Virgin Mobile customer service are the only exceptions. Minutes for all calls, incoming & outbound, will be deducted from your monthly allotment on your account according to your plan; there are no free mobile-to-mobile, Virgin-to-Virgin, weekend or night calls for any Beyond Talk nor payLo plan.
All of the Beyond Talk plans feature Unlimited Web, Unlimited Data, and Unlimited Domestic Messaging(Text, IM, Email, Picture messages) - with varying number of domestic Talk Minutes - starting at just $35/month.
Beyond Talk Monthly Talk Minutes Messages Web Access
Plans (Text, IM, Email, Picture)
• $55/month UNLIMITED UNLIMITED UNLIMITED
• $45/month 1,200 UNLIMITED UNLIMITED
• $35/month 300 UNLIMITED UNLIMITED
The Beyond Talk plans and phones are described at: http://www.virginmobileusa.com/cell-phone-plans/beyond-talk-plans/overview/#overview