It is not designed for cell phones. It is a pre-paid card you would use at a pay phone. It is not only U.S. but for overseas as well. It just says to call customer service for overseas rates. As in the type you would send to a military member for them to use to call home.
I tried to Google your question Napper, I could not find a concrete answer for it unless it was a pre-paid card directly for that. Such as a Verizon card. I am sorry I cannot answer your question. You might want to call your carrier and ask them if it is possible with a general phone card from Walgreens. Maybe they could answer it. Sorry I cannot be of more help.