I did "downgrade" with no problem, from the $35 / 60GB CanUSMex plan to a $30 / 30GB plan (even at 30GB, it is way more than what I need!). But... Not all plans are available to everybody! When my wife joined, the 60GB plan was $40. After a few month...
Had the same issue in Mexico. I could receive calls but couldn’t make any outgoing calls except to my voicemail. Finally realized that to get through I needed to dial the + sign before the 1. To dial + you need to press zero for a few seconds. Let me...