i have subscribed for free idd calls to india at $7. the app shows the idd usage and based on that i limited my idd out going calls. to my surprise, the talktime in the bill was not even near to the duration which was shown in the app. the app was showing 720 mins on the last day of the bill cycle. but in the bill, it is showing 820 mins. even previous month, the same thing happened, and i end up paying $100 extra.
so this time, i was very careful that not to use more than 700 mins. but howcome there can be a difference of 100 mins between the starhub app and the bill.
please resolve my query.