Question I'm travelling internationally this summer. Does Boost offer an add-on that will let me use my phone in Europe or South America? Answer We do not have an international add-on to use services in another country. If your device meets all requirements, you may be eligible to have it unlocked which would let you use it internationally on another provider's service. View Unlocking Requirements on for Boost devices. We do have add-on plans which allow customers to text or call from the US to other countries. View details about our International Plan add-ons.