En la sección Manage controls (Administrar controles), toca Limits (Límites).
Tap Purchase limit.
Enter the purchase limit in dollars (e.g., 50).
Once the limit is reached, purchases billed to Verizon are restricted until the next billing cycle.
Purchase limits must be less than $100 and apply to Apps, Games, Ringtones, Music, eBooks, Movies and Gifts.
At this time, free text alerts aren't sent for purchase limits.