Android make call activity to check prepaid phone balance
<p>I would like to make an activity where i can call a certain numer to check my prepaid phone balance. 
In my provider its for example *555# then i will get a response like for example "Your remaining phone credit is 5 USD". I would like to use this data (5 USD) to save in the database.</p>

<p>I am just a beginner, does someone know how to proceed?</p>
