There is no legal way to receive free Straight Talk minutes. Straight Talk has no section for promotional codes or coupons on its website, and its retail partner, Walmart, does not discount its Straight Talk plans.
Straight Talk offers three tiers of service as of 2015. Its lowest tier features 1,500 nationwide minutes. Both of its higher tiers offer unlimited nationwide minutes, and the higher tier offers unlimited international calling.
All three plans feature unlimited nationwide text messaging, and both unlimited plans provide unlimited domestic data. The lowest tier of service offers 100 megabytes of domestic data. All data service is over 3G.