When I can't access a particular topic or exercise, what should I do?
We recommended you click BACK to close the exercise, and start again. If the problem occurs again, close the application and open it again. If the problem persists, contact Vivo's Call Center.
When I am using a topic and the application stops, what do I have to do?
Close the application and then open it again. You can return to the same place and continue from where you left off.