Lycamobile, a T-Mobile MVNO that specializes in international calling plans is currently offering 15% off all of its plans for the month of September. Customers can use the code LYCAD8 to receive the discount. The code is only valid for new Sim cards with a plan purchase.
Lycamobile's plans range in price from $19/month for unlimited talk, text, and international SMS with 100 MB 4G LTE data and 1000 calling minutes to 11 international countries to $59 for unlimited nationwide talk, text and data with the first 3GB at 4G LTE speeds. The $59/monthly plan also gets you unlimited international sms and unlimited international calling to 70+ countries as well as bonus minutes to use to call other countries.