Final answer:
Customers with a T-Mobile No Credit Check plan should add Stateside International Talk to make international calls, offering unlimited calling to landlines in 70+ countries and discounted rates to 200+ countries.
Step-by-step explanation:
To call internationally with a T-Mobile No Credit Check (NCC) plan, a customer should add the Stateside International Talk feature. This feature allows unlimited calling to landlines in over 70 countries and destinations. Mobile-to-mobile calling is also available in over 30 countries.
Additionally, the Stateside International Talk offers discounted rates for calls to over 200 countries. If a customer frequently needs to make international calls, adding this feature could be more cost-effective than paying per-minute rates.