Seeing
coingate's ANN about this, OP could be talking about mobile credit in a postpaid plan which means they will be charged in their bill. If so, that's even harder to find. I'm not expecting it to be in demand either with all the additional fees... I do hope you have some sort of situation for this because there are cheaper and more accessible means to buy bitcoin.
I'd say look into your local exchanges and if there's none offering the same thing, thats probably all there is.