Guido Günther authored Mar 19, 2011 and Dan Williams committed Mar 19, 2011

<balance-top-up>
  <ussd replacement="CODE">*130*CODE#</ussd>
</balance-top-up>

CODE will the be replaced by the user input (e.g. the unique top up
code).

<balance-top-up>
  <sms text="foo">150</sms>
</balance-top-up>