ios - How to pay for something using my phone/sim credit? -


i developing iphone application(swift 2.0) targets metro bus system. person pay ticket using 2 ways:

  1. bank account
  2. phone credit i.e phone credit of user deducted every time pays ticket using phone credit.

now, not sure how achieve #2. how can make user pay ticket using phone credit.

i new here, sorry ambiguities in question. hope understand want ask.

i need ideas , clear explanations achieve #2.

thanks in advance answers.


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